Perceptual Subitizer to 4

Instantly recognizes collections up to 4 briefly shown and verbally names the number of items. 


You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

When shown four objects briefly, says "four."

Help your student become a(n) Perceptual Subitizer to 4

Activities throughout the day naming the number in sets of 1 to 4 and game-like opportunties to name the number in sets only seen for 2 seconds or less help develop this fundamental numeracy concept. Simple, high-contrast items (e.g., black dots on white paper plates) focus children's attention on the number in the set.

Practice-based Research: Children who can quickly recognize numbers, taking a mental “snapshot” of them, without counting, are more able to determine the number of items in a collection, represent that number, and, later, add the numbers. 

Use the small group dynamic as a chance to assess how high and accurately each child can name the number in small sets; increase the amount for each child to discover what numbers he or she knows.


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.