A new meta-analysis from researchers in the Netherlands tries to shed light on that question by combining the results of previous studies looking at how teacher ratings of ADHD symptoms compare to other measures of ADHD symptoms. It turned out there was a substantial correlation between teacher ratings of ADHD symptoms and ratings from clinical interviews although that correlation was far from perfect. In other words, teachers’ impressions of possible ADHD symptoms do capture something, but they certainly aren’t the final word.