Autor
National Council of Teachers of Mathematics
4
Association of Teachers of Mathematics
2
Canada. Industrie Canada
2
Curriculum Innovations, inc
2
Education Center (Greensboro, N.C.)
2
National Association for the Education of Young Children
2
National Council of Teachers of English
2
National Science Teachers Association
2
Reading Recovery Council of North America
2
Scholastic Inc
2
American Educational Research Association
1
Applied Probability Trust
1
Association for the Study of Primary Education (Great Britain)
1
Canada. Industry Canada
1
Council for Elementary Science International
1
Educational Research Association (U.S.)
1
International Council for the Improvement of Reading Instruction
1
International Reading Association
1
International Statistical Institute
1
National Association of Directors of Educational Research (U.S.)
1
National Council for the Social Studies
1
National Council of Teachers of English. Elementary Section
1
Royal Statistical Society (Great Britain)
1
Teaching Statistics Trust
1
University of Illinois (Urbana-Champaign campus). Bureau of Educational Research
1