Shape Class Identifier
Sub Trajectory: classifying

Uses class membership (e.g. to sort), not explicitly based on properties.


You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

  • Child explains, "I put the triangles over here, and the quadrilaterals, including squares, rectangles, rhombuses, and trapezoids, over there."

Help your student become a(n) Shape Class Identifier

Activities ask children to classify or name shapes based on their class; for example, can sort shapes into triangles and quadrilaterals (4-sided shapes) regardless of their common names or classifications (rectangles or squares).

Practice-based Research:  Alternating ways of making Don't Burn Your Feet shapes (tape, chalk, cut, or enlarged) on different days helps children generalize their shape knowledge by seeing different representations of the same geometric ideas.

Special Thanks To

Institute of Education Sciences
The research reported here was supported by the Institute of Education Sciences, U.S. Department of Education, through grant numbers R305K050157, R305A120813, R305A110188, and R305A150243. to the University of Denver. The opinions expressed are those of the authors and do not represent views of the Institute or the U.S. Department of Education.