ADHD Kids Taking Medication Show No Academic Improvement Over ADHD Kids Not Taking Medication

From The Wall Street Journal, "ADHD Drugs Don't Boost Kids' Grades Studies of Children With Attention-Deficit Hyperactivity Disorder Find Little Change" by Shirley S Wang:

However, a growing body of research finds that in the long run, achievement scores, grade-point averages or the likelihood of repeating a grade generally aren't any different in kids with ADHD who take medication compared with those who don't. (Typically, studies take into account accommodations schools provide kids with ADHD, such as more time to take tests.)

A June study looked at medication usage and educational outcomes of nearly 4,000 students in Quebec over an average of 11 years and found that boys who took ADHD drugs actually performed worse in school than those with a similar number of symptoms who didn't. Girls taking the medicine reported more emotional problems, according to a working paper published on the website of the National Bureau of Economic Research, a nonprofit economics research firm.