One of my "goals" in homeschooling my kids is to give them lots of realistic visuals to help them grasp concepts. Today, I made one such visual:
For extra math fun, I'm going to have my kids count out 109 beads along the diameter of the circle. When they get older, we can talk about why the math works out the way it does. They can also do conversions from the model size to real life. This was all stuff that I struggled to understand when I was in school. I'm hoping that my model will make it easier for my kids to understand these concepts.