Counter Forward and Back (10s and 1s)

Sub Trajectory: Strategy

Counts "counting words" (single sequence or skips counts) in either direction starting at any number. Recognizes that decades sequences mirror single-digit sequences. Switches between sequence and composition views of multi-digit numbers easily. Counts backward from 20 and higher with meaning. 


You may see this:

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Other Examples:

  • When asked, “What's 4 less than 63?” a child answers "62 is 1 less, 61 is 2, 60 is 3, 59 is, 59."
  • When asked "What is 15 more than 28?" "2 tens and 1 ten is 3 tens, 38, 39, 40, and there's 3 more...43."

Help your student become a(n) Counter Forward and Back (10s and 1s)

These activities ask much more than the name might suggest--beyond simple counting forward and backward, they include counting by different units to solve arithmetic-like problems. The activities provide tools for such thinking, such as the "open number line" and hundreds chart.

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.