Well the most obvious things are the lower arm is wider than the upper arm, the lower leg is wider than upper leg, and the feet are ginormous. Obviously a stylistic exaggeration (I hope). But not my cup of tea, and maybe not the best thing to do if you're trying to teach proper anatomy. Hips and crotch look strange too.
I'm sure most people here will benefit from this though. Its a pretty common mistake on pixel boards to make the muscles on outer side of legs and arms sit at same level as inner side. You've clearly shown that the outer sits higher. Your exaggeration might actually be good for this. And its nice to have a quick ref on the board for them. A nice springboard. For seriously learning anatomy though, I'd suggest they just pick up a pencil and read some books.