Since GT students are high-achievers many of them may not be able to exhibit growth on achievement tests as they are very close to getting every question correct. To address this, in Online Appendix Figures 7 � 11 we provide distribution plots of raw scores on each of the 7th grade Stanford Achievement Tests for students with Euclidean distances between -10 and 10. In all cases the mass of the distribution is centered quite far from the maximum score. For example in math the modal score is 62 out of 80 while for reading it is 67 out of 84 leaving substantial room for improvement."
But the kids with "Euclidean distances between -10 and 10" are precisely the average students with low test scores that I mentioned. They
aren't high achievers and it's no surprise that there's "substantial room for improvement" on a grade level test.
