The educational effects of frequent classroom testing have been studied and discussed since the early part of this century. Many possible reasons for its presumed benefits have been offered, such as increased practice, review, improved course organization, and frequent opportunities for feedback. However, reviewers of evaluations of frequent…

This digest provides an overview of several meta-analysis studies which focused on various aspects of science instruction. These studies examined: productive factors in science learning for grades 6 through 12; quality and quantity of instruction; effects of various teaching strategies on science achievement; instructional systems in science…