Research has focused predominantly on how teachers affect students' achievement on standardized tests despite evidence that a broad range of attitudes and behaviors are equally important to their long-term success. We find that upper-elementary teachers have large effects on self-reported measures of students' self-efficacy in math, and happiness…

Uses data from the Third International Mathematics and Science Study (TIMSS) to examine the relationship between class size and mathematics achievement in nine countries. In no country other than the United States was a beneficial effect found for small class sizes. Except in Hong Kong, neither curricular coverage nor instructional practices…

This article focuses on educational opportunity as an organizing construct of the Third International Mathematics and Science Study (TIMSS), in contrast with traditional opportunity-to-learn measures. A new conceptualization of educational opportunity is needed for cross-national studies. (SLD)