Resumen de The Impact of Middle-Grades Mathematics Curricula and the Classroom Learning Environment on Student Achievement

James E. Tarr, Robert E. Reys, Bárbara J. Reys, Óscar Chávez Bósquez, Jeffrey Shih, Steven J. Osterlind

• This article examines student achievement of 2533 students in 10 middle schools in relation to the implementation of textbooks developed with funding from the National Science Foundation (NSF) or publisher-developed textbooks.