Mathematical thinking at grade 3: introduction
. Things that come in groups: multiplication and division Flips, turns, and area: 2-D geometry
From paces to feet: measuring and data
Landmarks in the hundreds: the number system
Up and down the number line: changes
Combining and comparing: addition and subtraction
Turtle paths: 2-D geometry
Exploring solids and boxes: 3-D geometry Assessment sourcebook - Implementing the Investigations in Number, Data, and Space Curriculum.