The authors of the study "The Long-Term Impact of Teachers" claim that their study shows that increases in teacher value-added lead to significant and lasting increases in test scores and significant increases in income that will last throughout adulthood. Instead, I show that these claims are false because they are contradicted by the…

Factors contributing to American students' declining scores on the TIMSS (Third International Mathematics and Science Study) between grades 4 and 8 include textbook size and U.S. educators' traditional views of middle-school years. Bad data probably invalidate claims about the grade 8 to 12 decline. International reading scores favor Americans.…