Circle time games and activities. A must for any teacher.
Put the numbers in order from 1 - 20 (cut and paste)
Counting by Tens - Christmas and Winter Themed Literacy and Math (worksheets and centers) 100+ pages K-1
An Introduction to Centers in Preschool -- Centers explained, the importance of centers in early childhood classroom, and examples of centers
This is how I study. I always make sure to go back to topics I have trouble with and work with them until I can explain them (maybe not to a 6-year-old, but to a person who has no previous knowledge of the topic)