Math Squares are the best way to get most out of your planning. Cut the math squares before class and your students will have fun gluing and creating their own math worksheets. Since each time they chose a square, the possibilities are endless.
I like to keep my squares in little tin buckets from the dollar spot at Target.
Winter Math Squares for multiplication includes: practice tables 3-10 part-whole arrays write word problems fact families
A few minutes spent slicing up the math squares and you've got yourself a math center for many different levels!