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

One-to-one correspondence in counting collections to 20

Coordinate one number word with each object exactly once when counting a collection. Touch, move, or mark each object as it is counted to prevent double-counting or skipping. Collections in line, in array, and (stretch) in scattered arrangement.

Mastery threshold
90%
Min instances
14
Typical minutes
20
Spaced intervals (days)
1, 3, 7, 14, 30, 60
Common misconceptions
  • Counts the same object twice when objects are arranged in a circle (loses starting position).
  • Skips an object when objects are scattered and not moved.
  • Says count-words faster than touching objects (word-object decoupling — Fuson's 'production deficiency').
  • Touches multiple objects per word when collection is large and child is rushing.

Exercise pool (2)