T.L.
Hi K.,
I've previously shared this advice but it has helped my house with 2 boys (one with adhd) and 2 girls.
You could try out the 1-2-3 Magic System. It is written by Thomas W. Phelan, Ph.D. I have four children and one of my sons has been diagnosed with ADHD but this system has worked for all of my children. It takes a few weeks to get it implemented into your daily routine, yet is far worth the benefits once the kids understand your terms of discipline. Contact your local library or the school library to see if they have a copy of the book or the video that you can watch for free. The book is the winner of the National Parenting Publications Gold Award. It says that it is effective discipline for children 2-12 years of age. Good luck!