1. Teaching and learning mathematics with understanding;Carpenter,1999
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3. Reflective discourse and collective reflection;Cobb;Journal of Research in Mathematics Education,1997
4. Means for meaning;Doerfler,2000
5. Representations, inscriptions, descriptions and learning: A kaleidoscope of windows;Kaput;Journal of Mathematical Behavior: Representations and the Psychology of Mathematics Education: Part II,1999