Our high school has worked hard to transform our curriculum to meet the "real" NCTM Standards. We are using textbooks and materials that are centered around constructivist approaches to learning and which de-emphasis symbolic manipulation in favor of conceptual reasoning, a contextual approach to learning, and a high integration of technology. Our elementary program is of a similar philosophy.
Our middle school would like to follow suit, but we are having trouble finding middle school math materials that support a constructist approach. I'm sure that materials DO exist similar to the Core-Plus or Interactive Math Programs for middle school or Data, Number, and Space at the elementary level. Can someone enlighten me? There must be NSF supported materials for middle school, aren't there?