Planning for a substitute is hard. One never knows what information to include to make the day painless and easy on both the substitute and the students.
This is the template I have used for years. It is easy to update each time I have a substitute. I am also including a printable sheet for subs to leave notes about each class and an incentive chart.
In middle school sometimes the students need an added incentive to show off their best behavior. I have found that earning a party over the course of the year is a good incentive.
I hope you find these resources useful!