Kindergarten through 2nd grade

Number Relationships (Combinations) with Five-ness and Ten-ness

Beginning in kindergarten children can learn and incorporate a sense of five and a sense of ten when looking at groups of objects to instantly know the quantity. Subitizing (see second video below) is when children can look at an arrangement of objects and know immediately how many are in the group without having to count them individually. We really want our students to have this instant recognition of quantity based on relationships to 5 and 10.