highly significantp<0.0001
Even though average pre- and post-test scores were highly variable among schools (p<0.001, ANOVA) the pre- to post-change within each individual school was highly significant (p<0.0001, paired t test).
Even though average pre- and post-test scores were highly variable among schools (p<0.001, ANOVA) the pre- to post-change within each individual school was highly significant (p<0.0001, paired t test).