Euclid is a case of a district where implementation was strong, but where the sample size of the MathForward group was too small to detect significant effects.  MathForward and comparison students were roughly comparable, and implementation was strong in the classroom and well supported by district staff and coaches. But to show significant differences between the MathForward and comparison students, the differences between the two groups would have needed to be between 6 and 9 points. Those differences are large, relative to differences produced by interventions studied in education and that have been judged to be successful.