Standards in the classroom. An implementation guide for teachers of science and mathematics. (English)
Thousand Oak, CA: Corwin Press (ISBN 978-0-7619-3856-9/hbk; 978-0-7619-3857-6/pbk). xvii, 177~p. (2003).
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The Effects of Concrete to Semiconcrete to Abstract Instruction in the Acquisition and Retention of Fraction Concepts and Skills. (English)
Learn. Disabil. (Pittsbg. PA) 9, No. 3, 115-22 (1999).
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