AUTHOR
Nuffield Foundation
21
Scottish Education Department
21
Schools Council, Nuffield Foundation
20
Katagiri, George
16
Science Education Center, University of the Philippines
15
Tompkins, Gail E.
14
Philippines. Department of Education
12
Adorio, Mercedes P.
11
Ashlock, Robert B. 1930-
11
Billstein, Rick
11
Libeskind, Shlomo
10
National Council of Teachers of Mathematics
10
Carin, Arthur A.
9
Harlen, Wynne
9
Long, Calvin T.
9
Philippines. Department of Education, Culture and Sports. Division of Iloilo (Zone III)
9
DeTemple, Duane W.
8
Fay, Leo C.
8
Musser, Gary L.
8
Philippines. Bureau of Elementary Education. Curriculum Development Division
8
Philippines. Bureau of Elementary Education. Third Elementary Education Project
8
Abruscato, Joseph
7
Baldo, Trinidad C.
7
Biological Sciences Curriculum Study
7
Copeland, Richard W.
7
Diaz, Leonor E.
7
Gega, Peter C.
7
Gollnick, Donna M.
7
Kennedy, Leonard M.
7
National Science Teachers Association
7
Victor, Edward 1914-
7
Blough, Glenn Orlando
6
Burger, William F.
6
Ellis, Arthur K.
6
Fajardo, Amelia C.
6
Gunning, Thomas G.
6
Hurwitz, Al
6
Jacobson, Willard J.
6
Jarolimek, John
6
Lott, Johnny W. 1944-
6
Michaelis, John Udell 1912-
6
Reys, Robert E.
6
School Mathematics Study Group
6
Suydam, Marilyn N.
6
Wachowiak, Frank
6
Barber, Jacqueline
5
Butts, David P.
5
Clements, Robert D.
5
Dicsen, Josephine V.
5
Graber, Kim C.
5
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