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Jackson, C. Kirabo – National Bureau of Economic Research, 2012
Unlike in elementary schools, high school teacher effects may be confounded with unobserved track-level treatments (such as the AVID program) that are correlated with individual teachers. I present a strategy that exploits detailed course-taking information to credibly estimate the effects of 9th grade Algebra and English teachers on test scores.…
Descriptors: Teacher Influence, Grade 9, English Teachers, Algebra
Torner, Gunter – International Group for the Psychology of Mathematics Education, 2003
To probe beyond declarative knowledge about real numbers in secondary school, the authors interviewed students in Grades 9, 10 and 12. The main question seems to be whether the length of a decimal expansion is "indefinite" or "infinite." It blurs the mental representation of rational numbers as well. (Contains 3 footnotes.) [For complete…
Descriptors: Numbers, Grade 9, Cognitive Processes, Case Studies