[veridies]

I'd like to see research on this. I have an MA in TESOL and teach ESL, so this is very within my field. While some of what's happening here is basically a self-guided version of classwork, a lot of it seems to rely on very logically precise understandings (defining 'flat' as the shape of unmoving water). I can say from experience that students really struggle with being given a single example like that, even when they know all the words being used; it's just not how most people think. Visual aids and/or multiple examples are pretty essential, and often it requires watching a student to see what's registering and what isn't.

[kd5bjo]

It also falls into the trap of treating the most common definition as the only one. When you look up left/right in here, you'll find positioning, but nothing about liberal/conservative opinions or a legal guarantee (the right to X) or departing (he left the train station).