Research indicates that a socioeconomic status-related gap in mathematical knowledge appears early and widens during early childhood. Young children from economically disadvantaged families receive less support for mathematical development both at home and in preschool. Consequently, children from different socioeconomic backgrounds enter…

Alum Rock Elementary Union School District had an interest in a middle school program being introduced by Teachers' Curriculum Institute (TCI) called "History Alive!" Supplementary materials from TCI were already in use in many of the classrooms and several of the district administrators were interested in whether the full middle school…