Charter schools are the most popular alternative to traditional public schooling in the United States. The majority of research indicates positive effects of charter schools on student performance in traditional public schools. Most studies use the share of charter school students enrolled as a measure of the competitive pressure of charter…

This study supports the work of Black and Wiliam (1998), who demonstrated that when teachers effectively utilize formative assessment strategies, student learning increases significantly. However, the researchers also found a "poverty of practice" among teachers, in that few fully understood how to implement classroom formative…