Have him record the classes. There are actually smart pens that not only record, but if you take notes on special paper (which you can print out yourself), the pen can actually cue up the recording to that point in the lecture. Even if he spends the whole time doodling, he’d capture it. He can also send it to his computer. If he has it recorded he can always listen to it to confirm the assignment. Also find out whether his teachers post assignments online. Some do.