Early Comparer of Dissimilar Items

Sub Trajectory: comparing

Matches small (1 to about 4), equal collections consisting of different items, showing that they are the same number.


You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

  • A child matches collections of 3 shells and 3 dots, then declares that they "have the same number."

Help your student become a(n) Early Comparer of Dissimilar Items

Activities ask children to compare small sets consisting of different objects using a range of strategies, from perceptual judgements without numbers to counting to subitizing (and if the child does not use numbers, these may be modeled by an adult, confirming the children's judgements).

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.