Here you will find a variety of free Montessori based printables. Match-Up, Memory, Nomenclature Cards, and more.
Not familiar with the Montessori method? I highly recommend John Bowman's book ~
Montessori at Home. Even if you aren't going to implement a full Montessori based home preschool {which we do not}, you will find hundreds of simple ideas and tons of information to help you as a parent to understand the WHY behind the method!