Before learning to count, a child needs to understand one to one correspondence.
This means being able to match one object to one other object or person. 1:1 correspondence is simply the ability to match each member of one set to the member of an equal set.
Usually when we think of 1:1 correspondence, we are only thinking of matching one of something to one of something else, but this concept also includes matching two of one thing to two of another thing, or three, or four, or five, or a hundred (and on and on and on). For this activity, we practiced our one-to-one correspondence with bat erasers and numbers.
Using tweezers, students placed their erasers into an ice tray. Within each cube was a number (1-6). Students were instructed to match their numbers to the correct number of erasers that they were instructed to count out. In addition to one-to-one correspondence, this activity also targeted fine motor skills and hand-eye coordination.