Length Senser: Foundations

Sub Trajectory: Non-Measurement Comparison

Makes simple comparisons of length intuitively (similar to what we saw in Subitizing) as young as six months of age. However, may not recognize length as a distinct attribute (separate from general size, such as "small" and "big"). 


You may see this:

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Other Examples:

  • Children intuitively compare, order, and build with many types of materials, and increasingly learn vocabulary for specific dimensions.
  • Child says, "Let's count how many steps it takes to get to the door."
  • Child says, "It took us 10 steps to get from there to the door."
  • Child might say: "This is long. Everything straight is long. If it's not straight, it can't be long."

Help your student become a(n) Length Senser: Foundations

Experiences encourage manipulation and exploration of many objects' sizes. Beginning language can start with such simple terms as "big" and "little," but when appropriate switches to "tall" and "short" and "shorter" and "taller" or especially "longer."

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.