+ 1 Month
NISL led students gain more than a month of learning
A rigorous, quasi-experimental research study in 2011 by Johns Hopkins and Old Dominion universities evaluated 38 elementary and middle schools in Massachusetts that were led by NISL trained principals. “The results indicated that the NISL-led schools achieved statistically significantly higher student achievement in both mathematics and ELA versus the comparison group. The effect size was .14 in math and .11 in ELA. This translates into an average of more than a month of additional learning for all students in the 38 schools versus what would have been expected without the NISL EDP intervention.” Read the case study.