1. ERIC/CUE Dige;Ascher,1985
2. Selection of geological concepts for intermediate grades
3. (1978). Formal operations among high school adolescents from lower and middle socio-economic classes: An investigation of the scholastic import, psychometric structures, and styles of formal reasoning. Unpublished final report to the Spencer Foundation, Chicago, November, 1978.
4. & (1983, April). Productive factors in school learning: A quantitative synthesis of national assessment studies. Paper presented at the meeting of American Educational Research Organization, Montreal, Quebec, (ERIC Document Reproduction Service No. ED 230 575).
5. (1986). The home environment and school learning. Paper commissioned by The Study Group on the National Assessment of Student Achievement. (ERIC Document Reproduction Service No. ED 279 553).