Kids are most likely to repeat the behaviors that get the most positive feedback. If your child has homework and is on medicine for ADHD, have the child start the homework within 1 hour of taking the afternoon dose. That way your child will get the maximum benefit of concentration. Don't wait until right before bedtime, when the child is irritable because of sleepiness and there is no concentration-improving medication in his or her system. Be sure your child is getting enough sleep.
Sleep is so important for a child.
Stick to a regular bedtime. Sleep-deprived children tend to be more irritable and distractible. Only with this knowledge can you be of help.