Education technology is really powerful. The problem is that it is just as easy to use that power badly as to use it well.
You can see this with video lessons – clearly video allows you to do all kinds of cool things, but how many of these cool things will help students to learn better?
The best guide I have come across is the work of Richard Mayer, in particular The Cambridge Handbook of Multimedia Learning. It is truly exhaustive – it details hundreds of studies, establishes a couple of dozen principles, and makes it clear where the research is limited or in flux, and where the boundary of each principle lies. In chapter 3 of my book Teachers vs Tech I write about quite a few of Mayer’s principles. I also say that given just how complex …
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