The Montessori-inspired Hundred Board Activity Pack includes more than 15 number sense games and activities for grades Pre-K-3rd grade. It provides practice in the following mathematical skills: Number Sense, Number Identification, Number Sequencing, Ordering, Identifying Groups of Ten, Combining Groups of Ten, Making Sums and Finding Differences, Rounding, Pattern Skills, Skip Counting, Multiplication, Square Numbers, Fractions and Decimals, and Area and Perimeter. #montessoriactivity