My son is a sophomore in high school, and has been struggling with his ADHD (and grades) since 7th grade. We got him tested in 6th grade, and his tests came back positive for ADHD
(which explains the constant drumming of his fingers, fidgeting in his seat, and tapping his feet). After trying different medication, he entered middle school in 7th grade and did great academically, bringing home all A's and B's!!