by C. Elkins, OK Math and Reading Lady (updated post on 8-12-17)
The term “subitize” means to recognize quantity without counting. It is a concept recently added to the new OAS (Oklahoma Academic Standards). KG students should be able to “recognize without counting the quantity of a small group of objects in organized and random arrangements up to 10.” For first graders, the quantity is increased to 20 of “structured arrangements.” Subitizing is an important pre-requisite skill to learning addition and subtraction number combinations or number bonds.
Suggested items for the teacher to present this concept:
- Dot cards
- Ten frames and 2-color counters or tiles
- Dot dice
- Tally marks