Counters
Use counters for flexible modeling.
A suite of virtual counters for early arithmetic, set theory, and probability experiments.
Use counters for flexible modeling.
Build fluency to five.
Make ten a familiar anchor.
Work with teen numbers as tens and ones.
Show addition and subtraction on a grid.
Use bears to count, sort, and make groups.
Build and break apart numbers.
Drop in marbles to count, add, and take away.