With a bit of tweaking this can be used for older children too..Remember ADHD kids are about 30% behind their peers in brain development.. So they may need reminders/incentives for stuff you think they ought to know..
Behavior charts! Three check marks means the clothes pin moves down a step. If child gets to red, no stickers or screen time. Good behavior means the clothes pin moves up a step. Get to the top and child gets a sticker for the day at bedtime. 7 stickers = reward. Rewards may increase in value as time goes on.