15 Fun Math Activities To Make Common Core Easier With kids now in elementary school, I'm recognizing how much has changed from when I was a child, especially in terms of common core math. When my first grader talks of number bonds and tens blocks, I feel a little lost. Here are 15 FUN math activities to make common core easier to understand. These are especially great for Pre-K through 4th grade. 1. Pre K: counting beads on pipe cleaners 2. Visual addition 3. Getting interactive with common core 4. How I see numbers 5. Fraction flowers 6. Visual