(Guest Post by Matthew Ladner)
My son Benjamin was looking at the Jayblog, and I asked him “what do you think it would look like if I put Arizona charter students in one of those state NAEP cohort gain dot charts?”
He said “You’re going to need a bigger chart.”
Feel free to note ways in which it is not fair to compare charter cohort gains to statewide gains (there are indeed some) in the comments section. It is also “not fair” that some of those blue dots spend twice as much per pupil for a student body of relatively wealthy kids but get an oxygen tank shot into their academic toothy maw by a majority-minority student body.