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Barbara Reys

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Mathematics Unlimited: Classroom Activity Book Blackline Masters
Mathematics Unlimited: Classroom Activity Book, Grade 4
Guess Flash Cards Guide to Using Estimation Skills and Strategies
Developing Number Sense in the Middle Grades (Curriculum and Evaluation Standards for School Mathematics Addenda Series. Grades 5-8)
Number SENSE: Simple Effective Number Sense Experiences, Grades 6-8
Mental Math in Junior High
Number SENSE Simple Effective Number Sense Experiences. Grades 1-2
Number SENSE Simple Effective Number Sense Experiences. Grades 3-4