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Shakeel, M. Danish; Peterson, Paul E. – Program on Education Policy and Governance, 2021
Principals (policy makers) have debated the progress in U.S. student performance for a half century or more. Informing these conversations, survey agents have administered seven million psychometrically linked tests in math and reading in 160 waves to national probability samples of selected cohorts born between 1954 and 2007. This study is the…
Descriptors: Academic Achievement, Socioeconomic Status, Race, Ethnicity
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Taber, Keith S.; Tan, Kim Chwee Daniel – International Journal of Science and Mathematics Education, 2007
This paper describes findings from a study to explore Singapore A-level (Grades 11 and 12, 16-19 yr old) students' understanding of ionisation energy, an abstract and complex topic that is featured in school chemistry courses. Previous research had reported that students in the United Kingdom commonly use alternative notions based on the perceived…
Descriptors: Chemistry, Foreign Countries, Grade 11, Grade 12