The book you're looking for is authored by Catherine Twomey Fosnot and Maarten Dolk .

: Mapping the "big ideas" and strategies children use as they grapple with rational numbers.

: Emphasizing that children must "construct" their own mathematical truths through exploration and classroom talk.

At Work: Constructing Frac...: Young Mathematicians

The book you're looking for is authored by Catherine Twomey Fosnot and Maarten Dolk .

: Mapping the "big ideas" and strategies children use as they grapple with rational numbers.

: Emphasizing that children must "construct" their own mathematical truths through exploration and classroom talk.