The CTBA report ignores entirely previous research from the Brookings Institution, a random - assignment study — the gold standard of social science research — that found voucher students in Milwaukee scored six Normal
Curve Equivalent points higher than the control group in reading and 11 points higher in math.
It was also found that teachers who had high rates of technological implementation had average Normal
Curve Equivalent (NCE)
point gains of 10.9 on the CTBS, while teachers who had low rates of technological implementation had only a 1.1 NCE
point gain.