Angle Measurer

Understands angle and angle measure in both primary aspects, and can represent multiple contexts in terms of the standard, generalizable concepts and procedures of angle and angle measure (e.g., two rays, the common endpoint, rotation of one ray to the other around that endpoint, and measure of that rotation).


You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

  • Children calculate the internal measure of an angle as 90 degrees based on a turtle turning 270 degrees (external angle).

Help your student become a(n) Angle Measurer

Activities challenge children to see an angle in a variety of contexts (part of shape, a turn in a road, or a door opening) and compare the sizes of angles that may have different side lengths (which can distract people of any age) or are at different orientations. Without instruction, this and higher levels may not be achieved even by the end of the elementary grades.

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.