In kindergarten math, children learn the names of numbers and how to count them in sequence. They begin to become familiar with numbers 11-19. They should also be able to count objects and begin an introduction to geometry by learning to recognize and name shapes such as triangles, rectangles, circles, and squares. Kindergartens begin to learn the concepts of addition and subtraction, respectively, as "putting together and adding to" and "taking apart and taking from," according to the Common Core State Math Standards.