How to Motivate Your Teenager to Do School Work. My youngest daughter, 14, is in 9th grade and is horrible at doing her homework. She has ADHD and major depression for which she takes meds. Last year she was great at getting her homework done,. Helping Your Teen With Homework. What worked for you? I am at my witts end with my son. He wants to be a class clown, he doesn't do his assignments, he doesn't do his homework,. Helping Your Child Succeed. 539.672.721.6.. How do you get a ADHD teenager to do homework. Child Not Doing Homework How to get your teenager to do better in school. 3 Ways to Motivate Teenagers to Do Their Homework.acording to my teachers im a "briliant child/teenager the only problem she has is she wont do her home work." I personaly dont see why i should do my homework i get all As on my test without its help but unfortunetly half our grade is based off homework.. i have the biggest problem with doing homew