Kindergarten homework for now is to read with your child for 20 min each day.  Once we have taken everyone's reading level, "just right" books will come home with you child that your child can read, or begin to read as well as sight words to work on. 

If your child is working on letter names and letter sounds, colors, basic 2d shapes and/or numbers to 10, you can work on these at home as well.