One of my students takes a very small dosage of meds for ADHD. This student just told us he has been faking it for the past three weeks. He says that when he takes the meds he can focus but he can't do any thing. When he doesn't take his meds he can learn and do whatever he wants. This is true, I think. He's one of those rare people who can actually multi-task if one of the tasks is listening and the other doesn't require much concentration. The part he leaves out is that he gets frustrated and destructive when he's off his meds. But he sat in the office and cut box tops for an hour quite happily. At that point he could talk a little bit about what got him removed from class. Today I bought a football to play catch with him when he needs to have something in his hands when he's frustrated. We'll see.
Another student is perfectly well behaved and hardworking here. At home he throws things, yells at his guardian, walks out of the house and possibly hits people. Apparently he takes his meds regularly.
A third student had a very long history of violent incidents and was 5 years behind in reading and math. He recently was transferred to a therapeutic day program. He's never been on meds.