The Impact of Indiana's System of Interim Assessments on Mathematics and Reading Achievement

The randomized controlled study in Indiana found, and the WWC confirmed, that the use of Indiana’s Diagnostic Assessment Tools (mClass for K-2, Acuity for grades 3-8) did not have a statistically significant impact on general mathematics achievement or reading achievement for the full sample of students in grades K–8. However, statistically significant positive effects were found for grades 5 and 6 in mathematics achievement and grades 3–5 in reading achievement. No statistically significant effects were found for mathematics achievement in grades 3 and 4 or on reading achievement in grade 6.