Autor
National Council of Teachers of Mathematics
6
Mathematical Association of America
4
Consortium for Mathematics and Its Applications (U.S.)
2
Association of Teachers of Mathematics in the Middle States and Maryland
1
Cambridge Philosophical Society
1
Canadian Mathematical Congress (Society)
1
Canadian Mathematical Society
1
Cornell University. Library
1
Duke University Press
1
ERIC Clearinghouse for Science, Mathematics, and Environmental Education
1
Mathematical Association
1
Mathematics Education Research Group of Australasia
1
Nagoya Daigaku. Sūgaku Kyōshitsu
1
National Institute of Education (U.S.)
1
Project Euclid
1
Society for Industrial and Applied Mathematics
1
Universität Karlsruhe. Zentrum für Didaktik der Mathematik
1
Zhongguo ke xue yuan. Shu xue yan jiu suo
1
Zhongguo shu xue hui
1