Kindergarten Fall Math — Counting to 100, Subitizing, Cardinality, Shapes, and Pattern
Math · NS K math.gK.f.ns.count_to_100

Count forward to 100 by ones (and by tens; backward from 10 as stretch)

Recite the count sequence 1 to 100 by ones, accurately and in order. Count by tens to 100 (10, 20, 30, ..., 100). Count forward from any given number within 100 (start at 47, what comes next?). Stretch: count backward from 10 to 0 at concrete tier only.

Mastery threshold
90%
Min instances
16
Typical minutes
25
Spaced intervals (days)
1, 3, 7, 14, 30, 60
Prereqs

No prereqs — this is an entry skill.

Successors
  • math.gK.s.ns.compose_decompose_10
    (not yet loaded)
  • math.g1.f.ns.place_value_120
    (not yet loaded)
Common misconceptions
  • Skips a teen-decade boundary ('...28, 29, 20, 21...' — restarts at 20 instead of advancing to 30) — the decade-boundary error per Fuson 1988.
  • Confuses 'fourteen' with 'forty' (and similar -teen/-ty pairs) when counting orally.
  • Recites memorized count-word sequence without one-to-one to objects (this becomes a problem in count-objects tasks; here we name it but address it under one-to-one skill).
  • Counts backward by saying the forward sequence (says '10, 11, 12' when asked to count backward from 10).

Exercise pool (5)

Diff Stem Type
1 Use your 100-bead string. Touch each bead and count out loud, starting at 1 and going to 10. oral count with beads
2 Point to the numbers on the 100-chart and count to 20. point and count on chart
3 Start at 14 and count to 20. (Say only the numbers from 14 to 20.) count on from given
4 Count by tens to 100. (10, 20, ...) count by tens
5 Stretch challenge: Count from 1 to 50 without stopping. Notice the decade boundaries (29-30, 39-40). count to 50 stretch