If you are following, you know that we are all about early math instruction right now. Since I have an indoor/outdoor learning philosophy, I'm always looking for ways to move learning OUTSIDE. I've seen some token outdoor abaci/abacuses, but not any with a full 100 units set up for actual mathematical manipulation. It is a pretty cheap addition to our outdoor classroom. I will be adding a chalkboard to the side of this specifically for writing equations. While this is a manipulative…