Rheta Devries

Rheta DeVries is a professor at University of Northern Iowa's Regent's Center For Early Developmental Education, where she also serves as director. She has co-wrote many books along with Constance Kamii, concerning early childhood education curriculum that both influenced the field of early childhood mathematical instruction and accelerated the proliferation of constructivist-based teaching in the classroom.

DeVries has written several works including these:

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Wikipedia