Month: April 2012 (page 2 of 2)

Stephen Downes shared this article about the next big thing in network analysis. He writes:

Valdis Krebs argues that the next big thing in network analysis will focus on the contents of what we read (and not just the titles as entities) in order to draw connections between people. It’s a natural evolution of network analysis. "It is not just the also-bought data that matters (which books bought by same customer), it is what we specifically find interesting and useful in those books that reveals deep similarities between people — the hi-lites, bookmarks and the notes will be the connectors. Our choices reveal who we are, and who we are like!"

I’m going to argue that what would be even more valuable than a better way to determine who is most similar to us would be what important ideas do we not know, and perhaps we should. We have this crazy amount of data on what people read, what videos they watch, and who they chat with, which should in theory be able to help determine what "important" things they have not yet read, and even some of what they do not know. We should be able to use network analysis to direct learners into new learning experiences.

This is similar to the Netflix (and Amazon, etc…) recommendation engines, which suggest similar titles to what one has experienced already. Unfortunately this approach leads us isolated in a bubble. Instead, what if these recommendation engines looked at what was in our circles, and found something important to know that is perhaps an opposing point of view, or a different perspective on what we know. I’d happily sign up for a service that culled the best of the opposing ideas to my own perspectives and shared those new perspectives with me.

Instead of finding better ways of leading people to re-inforce existing knowledge, can we find better ways to direct them at new ideas?

The problem:

Our students had recorded video of themselves, but the audio from the video was too quiet to hear. Unfortunately, they had recorded their video on a Flip camera from a distance of 7 or 8 metres in a large open space, and forgot (or did not know) that this would result in extremely poor audio.

A solution:

We don’t have the kind of video editing software readily available for students that would fix this kind of problem (I think our film course has access to Final Cut Pro), so I wanted to find a free solution for fixing this audio.

I found WinFF, which is an open source video conversion tool, which happily converts from a video to audio, essentially isolating the audio from a video file. I downloaded it, and installed it to my computer. After some experimentation, which I did with the students, I discovered that the following settings worked best for this process.

I then imported this audio into Audacity, and used the volume adjustment option (see below) to increase the volume of the audio track of the video.

Once the audio volume was adjusted, I then imported the video and the new audio track into Windows Live Movie Maker, where we muted the original video, and used the new enhanced audio track. Queue the excited students who no longer have to re-record their video!

The follow-up problem:

This is essentially a magic tech recipe that the students may be able to reproduce, but I doubt they will be much better at trouble-shooting their own tech problems in the future. As I outlined the solution for the small group of students I was working with, some of them were interested, others were not. They displayed many of the signs I see when I see math taught the wrong way. They have no idea what the OGG audio format is, or why it would be the best choice to work with Audacity.

Questions:

1. How can we make learning technology more seamless? I see technology as a tool for other activities, but some of our current technologies are so difficult to work with that something which should be simple (increasing volume of a video) is difficult.
    
2. Is is better not to help these students in the long run when the task they want to do is beyond their current technology skills? Is there a reasonable balance we should strike between assisting students finishing the project today, and helping students become more independent tomorrow?
    
3. How is this related to mathematics education today? How often do we help students solve fabulous open-ended problems with magical mathematics techniques they don’t really understand?

Here is a list of people who blog about mathematics or mathematics education. Please let me know if you blog about mathematics education, and you’d like your blog to appear in this list. I’d like this list to be exhaustive, rather than exclude people. You can either contact me, or add your relevant information to this form.

So far this list has 347 (!!) blogs. Now that Google Reader is going to be taken offline, I’ve moved the list to a spreadsheet instead of a Google Reader bundle. You can access it by clicking below.

Find the list of blogs here

 
(Image credit: ASU presentation)

The research highlighted below the statement "Online is as effective as face to face" was used in a presentation at the ASU Education Innovation Summit to justify students in a k to 12 setting taking online courses.

From the first meta-analysis written by the US Department of Education,

"The meta-analysis found that, on average, students in online learning conditions performed modestly better than those receiving face-to-face instruction…"

Sounds promising, let’s read the rest of the abstract, shall we?

"…An unexpected finding was the small number of rigorous published studies contrasting online and face-to-face learning conditions for K–12 students. In light of this small corpus, caution is required in generalizing to the K–12 population because the results are derived for the most part from studies in other settings (e.g., medical training, higher education)."

That sounds a lot like the authors of the meta-study specifically recommended against using this meta-analysis as support for online learning in a k to 12 setting. I wonder why the presenter used this study?

We cannot draw conclusions on the effectiveness of online learning (as opposed to blended learning – wherein a student learns from a mixture of online and classroom activities) for k to 12 students based on the effectiveness of online learning in a post-secondary setting.

1. The motivations of k to 12 students and post-secondary students are different.
2. Many post-secondary classrooms do not represent the most effective pedagogy, so it may be easier for online learning to be equivalent or superior.
3. Access to resources necessary to be successful in an online setting (like a computer) are more prevalent in a post-secondary setting.

(Image credit: Harold Bakker)

When I was growing up, my house had a 50 foot wall full of books which our family had inherited from my grandfather with the house. Whenever I was bored, and the weather was ugly, I would pick a book off the shelf and read it. I devoured books from the shelves, some of which were probably inappropriate for my age, and some of which are considered classics. The library available in my home helped me become a better reader because I never ran out of something to read.

This is an experience my son has now, because we have a library of books in his room (albeit a much smaller library). However, as books become digital, it will be much more difficult for our library to be visible and accessible to my son. Parents will tend to make more choices of what their children should read. Licensing on books that prevents them from being copied means that children will likely have to explicitly ask for permission for every book that they read from their parent’s collection. Books will be selected less at random, and because we will be more likely to select books entirely based on our own interests, we will be less likely to be exposed to new information. Note that it would be relatively straight forward to set up "book servers" in houses that could act as personal libraries, and serve the same function, but current digital rights management on books makes this impractical (not impossible, every DRM has its weaknesses).

We are headed toward a society where books are not visible and accessible in our houses. If the books are invisible, they might as well not be there.