I am so excited that you are thinking about using stability balls in your classroom—it was the best decision that I have made as a teacher! With the stability balls the kids seem to think that learning is fun and enjoyable!
This guide has all my resources that I have developed over the past 3 years and a lot of it I have the kids complete because the more they put into it, the more ownership they take with the stability balls.
I have it outlined into 2 weeks (10 school days) and you can pace it out however you want, I just feel like it is really easy to keep the anticipation and interest high. These lessons can take 10-30 minutes each day, and you can choose how long it will take, but I believe the more emphasis you put on the stability balls and the respect towards them, you will not run into any snags mid-year.