Monthly Archives: November 2017

Responding to Student Mistakes

A while ago, I had something very similar to the following shared with me. The student was given the diagram and asked to find the measure of the angle marked with the question mark. The student has clearly made a mistake. Why did they do it? I asked on Twitter and here are some theories: Using […]

Online Practice is Terrible Practice

One of the ways computers are being used in math education is to provide students with online practice. There are a bunch of serious problems with most of these programs.   Here is one example from the Khan Academy (apparently at least one of the flaws outlined below no longer applies to the Khan Academy. […]