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Amazon.com: Elementary and Middle School Mathematics: Teaching Developmentally (7th Edition): 9780205573523: Van de Walle, John A., Karp, Karen S., Bay-Williams, Jennifer M.: Books
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9780134802084: Elementary and Middle School Mathematics: Teaching Developmentally - Van De Walle, John; Karp, Karen; Bay-Williams, Jennifer: 013480208X - AbeBooks
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John A Van De Walle Books - Biography and List of Works - Author of 'Elementary and Middle School Mathematics'
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