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Networked communities and E-learning Opportunities in Mathematics and Science

How can a networked community could be embedded in the design of authentic learning experiences in math or science?

Part of my ETEC 533 course is to examine networked communities, such as Second Life (as an example of a multipersion world simulation), using resources such as PBS Nova Adventures (which provides the ability to hold virtual field trips), and Western’s Integrated Laboratory Network (which allows students to complete a variety of lab experiments online). What these different systems have in common is that they provide a simulation of a real-life learning experience, accessed through the internet.

One immediate question I have is, do these networked communities have any value?  This question is relevant because before one can decide on the "How" one really needs to engage the "Why" question.

It is hotly debated for example whether Second Life is in fact a useful teaching tool1.  Having explored Second Life myself, it seems to me that with proper preparation (read here a LOT of time) one could construct a number of simulations for this faux-world that students could explore.  One could easily represent socio-dynamics and economics using Second Life, but as for Mathematical applications, I think these might be few and far between, and end up being contrived.  There are a number of science communities formed within the Second Life platform, which from a cursory inspection seem to have educational value.  Our instructor had us run through a tour of an astronomical observatory, and although I’ve seen better simulations of the solar system, the ability to communicate live with other students about the simulation probably makes this a valuable learning experience.

The discussion in class of the Integrated Laboratory Network (ILN) brought up some useful points.  The first point, brought up by Nancy was that the fact that the lab time needed to be booked ahead of time meant she really felt like she had to be prepared.  A number of other students in my class agreed with this point, and it would be interesting to see if this effect would happen in a high school settings since of course the preparation would involving learning.  Another valid point, brought up by Ian, was that the simulation felt more like "following a recipe instead of doing science", suggesting that the experiment wasn’t as valuable as a result.  Another student, Tris, reflected that at his school the design portion of a lab was an extremely important part of the experimental process.  My thought was that the use of this equipment physically would be extremely unlikely at the high school level and that if a student created an experiment which required highly specialized equipment, an ILN might be the only way to do it.

As for the simulated field trips, one of the greatest values I can see here is the ability to "explore" a location which is otherwise inaccessible.  I can imagine a time in the not-too-distance future where students would be able to book time using a highly durable robot, and explore Antarctica or Mars, both of which are places that are either extremely expensive or improbable places to visit.  Already there are excellent video field trips of many places in our world which are highly fascinating and learning rich experiences.  One obvious flaw with a virtual field trip is the lack of a tactile experience.  Without taste, smell and touch, the experience would be sensory deprived.

Of these three examples, it seems that only Second Life has a true social learning aspect built into its design.  An ILN or a virtual field trip really lacks that social context which benefits the learning for so many of our students.  It will be fascinating when computer processing becomes powerful enough to allow for multiple users to experience a virtually life-like simulation of a place caught on camera only.  When this happens, and if the people can communicate during the experience, then social learning affordances will be relevant to this type of learning.

Now suppose we wanted to design an actual classroom learning experience which would use one of these tools.  The easiest to do this for would be the ILN, since it has been specifically designed to be an instructional aid for laboratory science.  One would have students design detailed experiments, and then have a wide variety of different tools available to them to complete their experiments, through the use of the Integrated Laboratory Network.  Students would have to discuss their experiments ahead of time and reflect on their experiments afterward to allow for a social context for the activity.

To use the Second Life platform effectively, I think that a simulation could be constructed for the students to access, and then students would be given free reign to experiment within the science simulation (the orbiting of the planets seems like a good example for instance) and discuss their discoveries.  One would lack much control over the specific information learned by any particular student, but it could be a valuable learning experience, particularly for the students who need help visualizing three dimensional objects.

The virtual field trips would allow for hostile locations to be examined by students.  For example one could use footage of an exploration of the deep sea bed and show students how even in an hostile environment, life thrives.  This would make for an excellent learning opportunity in a biology classroom.

None of the resources we have been shown looks like it would be useful for a mathematics classroom without an enormous amount of preparation.  One could imagine that one could show a highly specialized simulation of a concept which involves a fair bit of mathematics, but it seems to me that any such simulations would be too contrived to be useful learning activities.

It is clear that there are uses of these networked communities within education, and even within science education there are opportunities for powerful learning to occur through these communities.  One doesn’t have to look very hard to find examples of things in science worth learning which are for various reasons completely inaccessible for students (imagine setting up a virtual black hole for students to look at for instance).  For this reason alone, I think these network communities are worth exploring, but I think that the inclusion of community needs to be stronger in most of these online systems (Second Life excluded) as this will allow for a strengthening of the learning opportunities available.

References:

  1. Aldritch, C. (2006) Second Life is Not a Teaching Tool, accessed from http://learningcircuits.blogspot.com/2006/11/second-life-is-not-teaching-tool.html on March 31st, 2009.
  2. Cancilla, D. A., Albon, S. P. (In Press) Moving the Laboratory Online: Challenges and Options, Journal of Asynchronous Learning Networks.

 

Online Geogebra training

Hi folks,

I’m planning on doing an online training session, we’ll see if I get anyone to sign up!  The first 20 people to post a comment here will be registered in this free training session in Geogebra.  This limit of 20 people is only because http://dimdim.com restricts the free online sessions to 20 people.  I’m not, by any means, an expert in the program, but I am happy to share what I have learned in 2 years of using the program.

  1. Post a comment to this post indicating what time works best for you.  You need to fill in your email field, which is hidden from everyone except me, the owner of this blog.  I’ll use your email address to send you the Dimdim meeting invitation, so it is important that you include it.
  2. Go to http://dimdim.com and sign up for an account.  You will of course need to use the same email address as step 1.  You should try it out first to check to make sure there are no problems ahead of time.  I’ll of course be testing this myself.   Update: We  might use Mikogo instead, it seems easier to use.
  3. Oh and I suppose I should mention that you really want Geogebra installed.  You can get it from http://geogebra.org and happily, it is free.
  4. I’ll also be putting up some resources on the blog, linked to this post, once I get a chance to organize them.  You should make sure to come back here and download those resources.

Of course this training session is dependent on my internet connection remaining up.  I guess if there are problems, we can always reschedule.  

 

Update:

Hello all,

A little over three years ago I decided I wanted to experiment with online learning, and I decided I would start this experiment with a training session for Geogebra, which is still software I love to use in my teaching. A week after I made announcements everywhere about the training session, my Dad died, and I never ran the session. Three years later, I’m still receiving registration requests for the program so I know there is still interest. At one point, all of you registered for this training opportunity.

I’m still personally interested in what this would look like from my perspective, but I already know of a terrific resource for learning Geogebra for beginners so I see little point in duplicating effort. Linda ran an excellent (and free) course last year, and I recommend using it as a resource for getting started with Geogebra. You can access it here: http://moodlemeets.learnnowbc.ca/course/view.php?id=3

It’s free, but you have to create a login at http://learnnowbc.ca in order to access the course. The course is archived, but there are lots of discussions archived in the forums, and you may find many of your questions answered there.

If you are still stuck, you can take a further plunge and if you have not already done so, sign up for Twitter and then search for #mathchat in the search box on Twitter. Many of the mathematics educators that post with the #mathchat hashtag use Geogebra regularly and may be able to answer your questions. Hopefully you’ve also already found http://geogebratube.com/ which already contains 10,000 Geogebra resources that are free to use and modify as you see fit.

Thank you,

David Wees

 

How can Geogebra be used to help students understand and visualize mathematics problems?

In your inquiry e-folio, reflect upon knowledge representation and information visualization based on your post above and the discussion it generated with your peers. Ensure that you refer to the software you chose to explore.

In my ETEC 533 class, we are in the middle of a really cool unit, and our task of this unit was to share a digital learning tool or resource with everyone else in the class.  I chose to share an open source geometry program I have used a lot, Geogebra.  Unfortunately my post has yet to generate any discussion, possibly because of the large number of other geometry packages available, and the therefore limited interest in this particular one.

This handy geometry package is free, cross platform, and very easy to use. It allows for the creation of geometric objects, which have various properties (including position, color, size, etc…) and which can be either a dependent or an independent object.  Independent objects can have associated dependent objects, and when you modify the independent object, the dependent geometric object is modified as well.

For example, suppose we created two points in the plane as independent objects, and then created an associated line through the two points as a dependent object.  When we move the position of either of the two points the line will change to match this movement.  This allows students to end up with a deeper understanding of the relationship between geometric objects.

This program is very flexible, and can be used to show simple geometric relationships (like for instance the geometric fact that the sum of the interior angles of a triangle is 180 degrees) to very complex geometric properties (the limit of the sum of rectangles which approximate the area underneath a curve is equal to the exact area under the curve).  Geogebra is then therefore useful in a wide variety of different contexts and branches of mathematics.

When students are using dynamic geometry software, such as Geogebra, they invariably end up with a deeper understanding of the material (Pütz 2001).  This is probably because they are given a strong visual representation of the object, that comes associated with a more tactile impression that comes with using the mouse to move and adjust the object.  Obviously there is a "wow" factor involved in the use of any new program, where the students are engaged with an activity simply because it is new, but it has been my experience that the use of these geometry packages ends up leading to a long lasting understanding of geometry.

Another advantage of Geogebra is that it allows the user to export the current file into a web ready format (a java applet) which can then be uploaded to a web server.  This provides the ability for students and teachers to discuss and analyze each other’s work, and allows for the creation of a social discussion about the work. 

Geogebra also allows a "construction protocol navigation bar" to be added to the file, which means that users can step the geometric construction process, one piece at a time.  This is a tremendous advantage of Geogebra as it allows a user observing someone else’s work to have some insight into the process they went through to create it. 

Geogebra allows students to actively and through the sharing of the work online, socially construct an understanding of geometry.  This program allows for simple visualizations of possibly complex geometric concepts, and helps enhance a student’s understanding of those concepts.

References

Pütz, C. (2001). Teaching Descriptive Geometry: Principles and Effective Methods Demonstrated by the Example of Monge Projection, XV Conference on Graphics, Sao Paulo Brazil, November 5-9, 2001.

Hannafin, Robert D. & Scott, Barry N. (2001). Teaching and Learning with Dynamic Geometry Programs in Student-Centered Learning Environments. Computers in the Schools, 17 (1), 121-141. Retrieved March 18, 2009, from http://www.informaworld.com/10.1300/J025v17n01_10

Using videos in mathematics education

I’m currently enrolled in my Masters in Educational Technology at the University of British Columbia, and it’s a wonderful program, I highly recommend it.  One of the things we are currently looking into is something called the Jasper series, which is essentially a series of videos intended to bring real applications of mathematics into the classroom.

The series has a set up a problem in the real world (like rescuing an injured Eagle, etc…) and students are given a bunch of information in a video format.  They have to decipher the clues in the videos and use them to help construct a mathematical solution to the problem, as well as justifying their final answers.

We’ve researched the videos quite a bit and found a lot of positive responses to the Jasper program.  The videos have tended to motivate and inspire weaker performing students and have been shown to help improve test scores on standardized tests.

Unfortunately the videos are a bit out of date, and the content area of the videos is about 4th or 5th grade level only.  Also the videos are quite expensive, running in at about 250 to 350 dollars EACH.

So I had a brainstorm which I wanted to share.  What if each of us created a single video with one of our classes?  I envision the students as the authors, actors, directors, and editors of their work.

The topics could be varied, certainly this technique is not limited to mathematics, we could do this in any topic area.  We would then <b>share</b> the videos with each other, (plug coming up) on a file sharing site like http://pedagogle.com and then we would all end up with a series of videos.

What kinds of mathematics SHOULD we be teaching in schools anyway?

I was surfing around when I found a really interesting post by Steve Yegge.  He makes the point:

I’m guessing the list was designed to prepare students for science and engineering professions. The math courses they teach in and high school don’t help ready you for a career in programming, and the simple fact is that the number of programming jobs is rapidly outpacing the demand for all other engineering roles. – Steve

He then proceeds to describe some processes for learning mathematics on your own from the perspective of a computer programmer, which are worth reading about since pretty much anyone with an analytical mind and some experience in mathematics could follow a similar approach quite successfully.

This one point I think needs a bit more in depth discussion though.  Are we teaching the right types of mathematics in high school?  Are there any topics which might better prepare our students for careers outside of school?

First let’s look at career opportunities, focussing on jobs which are growing the fastest.  I’ll compile a list here, see my references at the end for sources of this information.

If we look at the list of the 30 professions with the largest employment growth, as an absolute growth rather than a percentage growth we see can pretty much separate them into two basic categories: those which require specialized training in a university, and those which do not. 

The professions in the first category, according to this list, are registered nurses, postsecondary teachers, elementary school teachers, computer software engineers, accountants and auditors, management analysts, network systems and data communications analysts.  The professions in the second category include things like carpenters, security guards, home health aides, etc…

We can also look at the current job statistics, where we see that professional, service, administrative support positions are by far the most common occupations for people to have today.

So the obvious question becomes, what types of mathematics do you need to be successful at these jobs?

1.  Statistics

Everyone needs to know statistics.  We use it all over the place because our society has become driven by data.  We collect it, we sort it, we analyze and we use statistics to make all sorts of arguments as a result.  Not understanding some pretty complex ideas in statistics is a serious hindrance in many areas.

2.  Probability

In order to be able to make intelligent decisions, people need to understand that the outcomes of those decisions are all based in probabilities.  Decisions about what medication to give, etc.. are based on the probability that a given treatment will be successful so understanding probability helps care-givers make better decisions.

3.  Number theory

Having a good grasp of what is going on in the various computer algorithms out there isn’t a bad thing, and courses in number theory could help out a lot of people.  It might be hard to justify this mathematics for the typical profession, but for the computer related professions, number theory is almost vital to being able to do their jobs properly.  So some more advanced number theory should be part of the higher level mathematics courses at high school and a basic introduction to number theory should continue to be included for everyone.

4.  Algebra

We still need to teach algebra and everything related to it.  We should also include more linear algebra in school in the more advanced mathematics classes, as a deeper understanding of linear algebra is crucial to many computer related positions.  As well, linear algebra is useful for almost all of the engineering fields and sciences, which is why universities typically include an introduction to linear algebra in those programs.

5.  Geometry

A little bit of geometry is a good thing so let’s keep a small amount of important geometry.  However we are still hammering our kids with geometric proofs from 2 thousand years ago that have almost no relevance in the work-place.  Proving something true is good for developing analytical reasoning but let’s do that in number theory instead.  Let’s leave the chords and tangents to a circle for a university level course instead.

What’s important in these statistics is that of the technical jobs, we no longer see engineering (except possibly computer engineering) prominently placed, which was one of the professions for which the US originally developed the current mathematics programs.  Computer related fields have surpassed the design and engineering fields which suggests that more mathematics which is useful for computer scientists should be taught in school.

Curriculum needs to be chosen that reflects the trends in the workplace, rather than on an ad-hoc basis, or because we have always taught it.  If the US, and countries whose education systems emulate the US, are to be more successful in a global market, our high school students need to be better prepared for the real world.  Every day we are inundated with statistics and a typical member of society needs to understand these better, in order to make more informed choices.  It is our school’s job to supply this curriculum, and it is our job as educators to implement it.

US Department of Labour

 

What are the characteristics of properly used technology in a mathematics or science classroom?

Here is a question posed in my class this week.

What is a good use of technology in the math and science classroom? What would such a learning experience and environment look like? What would be some characteristics of what it is and what it isn’t?

Here are my thoughts in no particular order.

  • The technology is being used seamlessly in the lesson. Students do not need to spend 5 or more minutes learning the technology because they know how to use it already. This means that new technologies should be introduced separately from their use if possible, or be so easy to use that they require no special instructions
  • Technology should be used to provide simulations or examples which are either difficult to do in real life, or time-consuming. Its purpose should be to demonstrate an idea or help handle repetitive tasks as part of a bigger picture
  • If it is possible and easier to use a non-technological solution to presenting some information, this should be used as experiences grounded in what the children know are preferable (see constructivism).
  • Use of technology to facilitate communication that is above and beyond what is normally possible in the classroom is also an example of an acceptable use of technology. This can be used to extend instructional time outside of the classroom, by providing a classroom blog for instance for students to post questions, comments, and summaries of what they have learned.
  • The people implementing the technology (the teachers or instructional aides) need proper training first, no technology should be implemented by people who are not experts in the technology first. Otherwise, when problems occur, valuable instructional time will be lost when the teachers/aides cannot fix the problem quickly.
  • The technology needs to work without too many major bugs, it needs to be easy to use, and it should run quickly.

A good learning activity would have students using a web applet, for example, or a simple desktop application to run a simulation, and then analyze the data given by the simulation to come to some conclusions about what they have seen. Students would be engaged not by the technology, but by the simulation itself.

I guess that the use of technology should not be simple because it exists, but because it is much easier or less time-consuming than trying to make the same discovery using non-technological tools. I feel like under these circumstances, technology can actually be a useful replacement for a real-life experiment. It could also be useful if an experiment can be done under ideal circumstances in a simulation, and then confirmed in the less than ideal real world

One of my colleagues in the class, Tris says pretty much the same thing.  He gives some different examples though which are worth mentioning.  Specifically:

  • This could be by extending or enhancing a students understanding of an area of content (using a computer simulation or model)
  • speeding up a process (using a graphing calculator to graph functions rather than pen and paper)
  • improving a students grasp of basic concepts (using a computer game [to] memorize timestables)
  • increasing the number of learning styles or intelligences being addressed in the classroom, or reducing the cost of education (making content available online rather than purchasing textbooks – this being a hypothetical argument assuming no copyright issues)

– Tris (posted in the ETEC 533 discussion forums)

His ideas pretty much mirror mine, but I’m including his examples because it provides more ways of using technology in a thoughtful way. I particularly liked how refers implicitly to Howard Gartner’s multiple intelligences theory as a reason for using technology, which I think is excellent. Pretty much every teacher has noticed that students learn differently, and that providing multiple forms of representation of the material you are trying to cover is going to benefit your students. I’ve noticed that my use of daily classroom summaries seems to have helped reduce the gap in achievement between my ESL students and my other students. I should do some research to see if this actually the case, or if I am just imagining the gap closing.

Ian, another of my classmates agrees with me in one point, so I’m going to quote him here, since he says it better than me.

"Ironically, the use of technology in classroom teaching should endeavor to focus as little as possible on the technology as possible…" – Ian

A photocopier.This is a good observation to make since so often it seems technology is just used because it exists. If we think of older technologies, we can see that the ones that have been successful have followed this credo. I’m thinking of the overhead projector, a word processor running on a PC, the photocopier, etc… none of which people think of as "fancy technology" but which have made an enormous improvement on our profession. Can anyone imagine a school with no word processors, no photo-copiers and no overhead projectors?

 These old technologies are just seeing a resurgence in their development actually because of the green environmentalist wave that is sweeping across our society.  So maybe they aren’t so taken for granted as I think…

 What new technologies do we see in use today will become the norm for classrooms for the future?  Is every classroom going to have a smartboard?  Every student with a tablet PC?  Are wireless interfaces going to change the way we interact with technology?  I think the answer is that the same properties that made the older technologies (like a photocopier) so useful are going to be the properties which determine which technologies survive for the future.

Ways to use Geogebra in a mathematics classroom

There are a lot of good open source programs out there, but not many of them have direct application to a mathematics classroom the way Geogebra does.  Geogebra is a software package for creating and manipulating geometric objects.  It also allows for graphing of funcitons and manipulating the functions in all sorts of interesting ways.  It runs on the Java framework, which means if you have Java installed on your computer, you can run Geogebra, which makes it any Java enabled operating system.  This means the very same program will run on Windows, Mac, Linux or Solaris, although the installer is different for each operating system.

If you are planning on using the program with your students, it is nice to know that they can install the program for free, and that it is very likely to work on their computer.  The only caveat is that you need to make sure the students have the right version of Java installed if they have any problems as this can sometimes be an issue.

Geogebra has all of the standard Geometry software functions.  You can add lines, circles, ellipses and all other sorts of geometric functions to the document.  You can also make one object a dependent of another object which means that changes in the original object propagate to its dependent objects.  So in other words, if a you draw a line segment which depends on the location of point A and point B, changing either point A or point B modifies the line segment.

There are 2 cool things I like about Geogebra.  The first is that you can export your working file as a dynamic worksheet on a web page, which means you can easily make what you are working on web ready.  The second feature which I use all of the time is the ability to export my current file as a picture in PNG (and a few others) format.  This allows me to use Geogebra to create graphs for inclusion in my online posts, something my students and I use Geogebra for all the time.

Geogebra also has an input textfield, which means that every command you can use the interface to enter, you can also type in.  Some commands are done much more easily through the input textfield, things like entering y = x^2 + 3x which uses the nature notation to graph a function.  Entering Function[x^2, 0, 2] graphs the function over the domain from 0 to 2 for x.  Very handy.

Using Geogebra with your classroom is an affordable way to bring high quality geometry software to your classroom at an extremely affordable price (its free!!).  I’ve only scratched the surface of what Geogebra is capable of doing, I suggest you try it out yourself.  Maybe when I have time I’ll create some tutorials on using it.

 

Formatting mathematics equations online

One difficulty faced by any mathematics teacher who wants to present material online is formatting of their documents.  Ideally, you’d like to be able to add equations to your online documents as easily as you can to Microsoft Word.  Unfortunately, this is not the case.

Over the past three years, I have researched a number of options.  There are no simple solutions to this problem, just solutions with varying degrees of difficulty.  A number of these solutions are within reach for your students to use as well, should your students be involved with any of your online projects.

The simplest solution I have found is unfortunately using a propietary program.  Basically the steps are as follows.  You open up Microsoft Word, and confirm you have the bundled Equation Editor installed.  This is likely to be true in Word 2003, and virtually assured in Word 2007. 

Basically the steps are as follows.  You create the equation using Equation Editor.  It really is one of the easiest programs to use.  Unfortunately, in both 2003 and 2007, the equation is not immediately an image, it is and object in a Word document, so you need to find a way to export it out of the program.  If you are using 2003, what you basically create a screen-shot of what appears in your monitor, and paste the result into a simple image editor.  Crop the screen-shot appropriately, save it as a file, and you are good to upload your image for insertion into your online document.  In 2007 you don’t need to create a screen-shot, you can just go to File ⇒ Save As ⇒Word 2003.  Microsoft Word automatically converts all of the equations in your document to images, which you can then Copy and Paste into some image editing software one at a time and save as pictures.

The benefit of this process is that the creation of the equations is relatively straight forward.  However, this process is a bit tedious especially if you have a lot of equations to produce.

Another option is to create the equations is to use an online equation editor such as the one available at http://www.sitmo.com/latex/.  This allows you to enter in LaTeX and produce an image of your equation.  So you enter the very cryptic x = \frac {-b \pm \sqrt{b^2-4ac}}{2a} and it turns it into the equation .  Fortunately on the page in question their editor allows you to modify the LaTeX using some buttons, which simplifies the process.  You can also preview the result of your LaTeX to make sure it is correct.  You then save the resulting preview image to your computer, and upload and insert it into your post.

There are two problems with this solution.  The first is that if Sitmo goes out of business, you lose the ability to add equations in this manner.  The second problem is that you again, have to create each equation one at a time, and upload them one at a time to your online document.  The benefit of this solution is that it doesn’t require you to install any software and will work on any computer, anywhere.

A third solution is to host your own CGI on your server to convert your own LaTeX that you type into your interface to create the documents, and it is converted automatically into an equation image for you.  This is ideal, except that whether or not it works depends a lot on your server set up, and what content management system you are using.  For Drupal there is a module you can add which does this, called Mathfilter which I know works, since I wrote the module.  You can use it, and apply a patch suggested by one of the Drupal developers, to produce very similar equations.  [tex]x = \frac {-b \pm \sqrt{b^2-4ac}}{2a}[/tex] becomes  using the filter.

The problems with this 3rd solution are numerous which essentially all boil down to needing some technical expertise to install the system, and needing knowledge of LaTeX to use it.  The benefit is, you become in charge of when and where you insert equations into your documents, and you can insert them on the fly as you create your document.

Whatever method you choose, it is clear that including mathematical equations online is feasible, even if none of the solutions is really mature. 

Making mathematics fun

One major barrier to students learning mathematics is that they spend a lot of time NOT enjoying themselves.  Let’s be honest, listening to poetry is enjoyable if the poetry is selected carefully.  Having discussions about current events in History, while learning critical analysis skills, is fun.  Solving a cubic equation is just not a lot of fun, even for mathematicians.

We as mathematics educators are charged with the job of making math accessible and more easily learned by our students.  It makes sense therefore to inject a bit of fun in once in a while, especially if you can justify it with some educational theory that suggests it is pedagogically worthwhile.

Trebuchet projectA project I have done with my 9th grade students now for 4 years in a row, is to have them do some quadratic modelling.  When I worked in London, I was really lucky because the students were creating trebuchets and catapults in their Design class.  So we had a class where the students took their models they created in Design up to the nearest park, and we took digital footage of the trebuchets in action.

At the end of the period, when the students had enough footage, they submitted some samples of their models at work in digital form directly to my computer, and that night I converted their video to a usuable form.  This actually meant I spent hours figuring out how to convert all of their wacky video formats into something readable by the FFMPEG converter to an flv file, which I could then set up to stream.

There were some technical difficulties which some of the groups had.  For example, one of the groups decided to do their footage from 20 metres away with no background…their poor little golf ball wasn’t very visible in their footage.  Another group videographer had a very unsteady hand.  However, I ended up with 6 good videos, so I split the students into 6 groups and they went to work analyzing their footage the next class.

Students had to figure out a way to convert the flight of their ball into coordinates, in other words numerical data.  They then had to decide on a model for their data, and find an equation to represent it.  I also had them calculate the mean horizontal speed (which involved being able to convert frame rates into an appropriate unit of time).  Finally there were some questions the students had to include in their write-up for this projectto focus their thinking on the physical phenomena that happened.

What was wonderful about this experience is the reaction of the kids.  At all stages of the project they were all actively engaged and interested in what they were doing.  The mathematics, which could have been very dull and boring for them came alive.

Just listen to the reaction of the students in the video when their trebuchet goes off for the first time.  How often do you get to hear a spontaneous cheer in a mathematics class?