Researchers examined teacher-related variation in the effects of a classroom intervention designed to impact seventh graders' beliefs about the nature of ability in science as fixed or malleable. Analyses of quantitative data from 7 science classrooms across 2 teachers revealed significant teacher effects in the extent to which students' beliefs…

In this article we examine how students engage in learning mathematical concepts in the middle grades of an urban public school in the Southwestern United States. In the context of a 3-year National Science Foundation-funded longitudinal study of the development of students' rational number understanding, we encountered differing levels of…