Author
ebrary, Inc
235
National Council of Teachers of Mathematics
170
National Assessment of Educational Progress (Project)
140
National Center for Education Statistics
138
ProQuest (Firm)
128
SpringerLink (Online service)
112
Association for Computing Machinery Special Interest Group on Computer Science Education
108
Educational Testing Service
97
American Chemical Society Division of Chemical Education
94
James Hosmer Penniman Book Fund
86
National Science Foundation (U.S.)
79
Unesco
68
ACM Digital Library
64
Reese, Clyde M
58
Ballator, Nada
55
National Science Teachers Association
54
Jerry, Laura
53
Carr, Peggy
50
Association for Computing Machinery
49
Carroll, Catherine, 1951-
49
Mumme, Judith
49
Mathematical Association of America
47
National Assessment of Educational Progress (Program)
46
Roth, Wolff-Michael, 1953-
42
American Association for the Advancement of Science
40
De Gruyter
40
Eisenhower National Clearinghouse for Mathematics and Science Education
40
Sriraman, Bharath
39
United States National Aeronautics and Space Administration
39
United States Office of Educational Research and Improvement
38
National Institute of Education (U.S.)
37
School Mathematics Study Group
37
International Commission on Mathematical Instruction
36
EBSCOhost
35
Edgar Fahs Smith Memorial Collection (University of Pennsylvania)
35
History of Science Collection (Brown University)
35
Keeley, Page
35
Smith, David Eugene, 1860-1944
34
International Commission on the Teaching of Mathematics
32
Organisation for Economic Co-operation and Development
30
World Scientific (Firm)
30
Huxley, Thomas Henry, 1825-1895
29
International Association for the Evaluation of Educational Achievement
29
National Research Council (U.S.) Mathematical Sciences Education Board
29
ProQuest ebook central
29
United States Office of Education
28
United States National Assessment Governing Board
27
American Association of Physics Teachers
25
Kaur, Berinderjeet, 1955-
25
Kilpatrick, Jeremy
25
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