Planning for a substitute teacher has never been easy for me. It is difficult to plan activities that someone else will be able to carry out. Teaching in a computer lab has made this a bit easier, but not foolproof. I teach lessons with an interactive whiteboard which is not available to substitute teachers. In order to make my plans clear to my students, I have begun using visual lesson plans.
I take screen shots of the activities I want my students to complete. I print out a Word document for each class and tape them onto my whiteboard for all to see.
Confusion is avoided about what students are to do. I also spend much less time writing explanations to my substitute teachers.