Focus on number recognition and counting. Being able to count is just one component of number fluency. Children need to be able to recognize numbers in isolation. Number recognition will help children grasp addition and multiplication facts faster and easier in later grades.
Review skills every day. Children will benefit from repetitious activities like counting and reciting colors and shapes. You can also review math while reading aloud to the students. Stop periodically during a story and ask the kids to tell you the colors or count the number of objects on a page.
Use manipulatives to demonstrate math concepts. Preschool students enjoy learning with hands-on activities. Allow children access to plastic number tiles, blocks and colored counting beads. These tasks have students work at once on multiple skills, such sorting, counting and motor skills.
Play games to reinforce skills. Games can be simple and for the entire class. For example, there are several varieties of Bingo that use numbers, shapes and colors. If you are fortunate enough to have access to computers, the Internet has many sites with preschool level math games.