High schools in the United States are facing increased scrutiny to increase the number of students graduating with a diploma in four years. This pressure comes from many sources. First, the No Child Left Behind Act instituted graduation as a measure of a high school's success at the federal level. States soon followed by increasing accountability…

Despite the ever-increasing number of online professional development (OPD) programs, relatively few studies have been conducted to examine the efficacy of such programs for teachers and students. This manuscript presents findings from an impact study of OPD courses in fractions, algebraic thinking, and measurement on 79 fifth grade teachers'…