Length Quantity Recognizer

Sub Trajectory: Non-Measurement Comparison

Identifies length/distance as an attribute. May understand length as an absolute descriptor (e.g., all adults are tall), but not as a comparative (e.g., one person is taller than another). May compare non-corresponding parts of shape in determining side length.


You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

  • Child says, "I'm tall, see?"
  • Child says, "Mommy is big and the baby is tiny."
  • Child says, "Who is bigger - mommy or daddy?"

Help your student become a(n) Length Quantity Recognizer

Experiences focus on differentiating length from other measures of size (e.g., area or volume) and helping children move past simple classifications (tall and short) to see gradations and relationships (a stick longer than another stick but shorter than some other one).

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.