Punishment doesn’t change behavior because it doesn’t address the cause of the behavior. If you haven’t yet, read Ross Greene’s “The Explosive Child.” His approach works for kids that don’t improve with “crime and punishment” parenting.
Check out his article with a brief overview here:
This is a piece I wrote on positive parenting too:
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism