One to one correspondence must be in place in kindergarten for a child to continue to manipulate numbers and understand other mathematical concepts. One to one is simply being able to touch one object for each number that is counted aloud. By this point, most of our kids have a good grasp of this concept, so we take it a step further by using numbers 1-25 and using different materials.
I found myself doing 2 good number sense activities in a week and
quickly took some pictures to share.
ABC and 123 (I couldn't find the original post - sorry!) and it worked out so well. We made masking tape number flags and then the kids strung that many beads onto the pipe cleaner.
If you have a good one-to-one correspondence or number sense activity, I'd love to hear about it!