Young — Mathematicians At Work: Constructing Frac...

You can find more details or a copy of the book through the Heinemann publisher page or educational repositories like ResearchGate .

: Mapping the "big ideas" and strategies children use as they grapple with rational numbers. Young Mathematicians at Work: Constructing Frac...

The book you're looking for is authored by Catherine Twomey Fosnot and Maarten Dolk . You can find more details or a copy