Being a baseball fan, I had never considered that baseball could be so complicated. Luckily, the instructor knew exactly the types of things to cover. The first week, he covered how you get to each base from home. I would have never thought to explain that you have to run to first base FIRST.... it just seemed like it would be obvious.
Goodness, I guess even sports have to take a Montessori approach -- demonstrate how it's done!
To practice at home, I've made a simple printable to match the bases and the in-field players on the field. I've also made some command cards to go along with this activity, as well as added some baseball players to simulate a game.... there's even two umpires signaling "safe" and "out."
I hope someone else can use these besides me. You can download them here.