Catching students up who have fallen behind academically is a key challenge for educators, and can be difficult to do in a cost-effective manner. This field experiment examines the causal effect of a program designed to provide struggling sixth and seventh graders with math instruction delivered in small groups of roughly ten students by select…

The effect of summer break on mathematics and spelling performance of second through fifth grade students were assessed by comparing aggregated curriculum-based test scores administered in the spring and fall. Results indicated second and third grade students regressed in spelling; not in mathematics. The reverse was true for fourth and fifth…