Property Class Identifier

Sub Trajectory: classifying

Uses class membership for shapes (e.g., to sort or consider shapes “similar”) explicitly based on properties, including angle measure. Is aware of restrictions of transformations and also of the definitions and can integrate the two. Sorts hierarchically, based on properties.


You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

  • Child explains, "I put the 'equilateral triangles' over here, and 'scalene triangles' over here. The 'isosceles triangles' are all these...they included the equilaterals."

Help your student become a(n) Property Class Identifier

Activities require children to form classes and subclasses based on geometric properties, including angle measures.

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.