Conceptual Subitizer with Place Value and Multiplicative Thinking

Verbally labels structured arrangements, shown only briefly, using groups, multiplicative thinking, and place value. This level builds on the previous level, such that children are able to use the base-10 system to conceptually subitize larger numbers. Children are able to verbalize the quantity of 10's they see. 

Activities

You may see this:

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Other Examples:

  • A child sees a group of 62 dots and says "I saw groups of tens and threes, so I thought, 5 tens is 50 and 4 threes is 12, so 62 in all."
  • Shown 4 dice, 3 on the 5 sides and 1 on the 2 sides, a child says "That was 15 and 2... 17!"

Help your student become a(n) Conceptual Subitizer with Place Value and Multiplicative Thinking

Game-like activities ask children to name the total number in two sets, at least one of which has multiple copies of 10s and 1s in clear equal groups (e.g., 3 groups of 3 ones).

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.