A research based, NSF funded, K5 mathematics program integrating math, science and language arts. Includes a Spanish translantion of instuctional units.

"A complete research-based, K-5 mathematics program integrating math, science and language arts. [The program] embodies the NCTM Principles and standards for school mathematics and is based on the ideas that mathematics is best learned by solving problems in real-world contexts and that a curriculum should balance conceptual understanding and procedural skill"--P. [4] of cover.