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Displaying 1-2 of 2 results for author "Helgeson, Stanley L."
Sources of information about promising and exemplary programs and materials for secondary school mathematics [microform] / by Stanley L. Helgeson, Marilyn N. Suydam and Robert W. Howe.
- Text
- [Washington, DC] : U.S. Dept. of Education, Office of Educational Research and Improvement, Educational Resources Information Center, [1989]
- 1991-1989
Promising and exemplary programs and materials in elementary and secondary school-science [microform] / Stanley L. Helgeson, Robert W. Howe, Patricia E. Blosser.
- Text
- Columbus, OH : ERIC Clearinghouse for Science, Mathematics and Environmental Education, [1990]
- 1990
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