I have a folder in my desk that's always there and ready for a substitute. In the front pocket I have referral slips and corridor passes. In the back pocket I have attendance rosters, seating charts and calculator checkout sheets. The pages in between include a quick reference for the substitute, the bell schedule, rules that aren't on my syllabus, a class syllabus, a typical class format, fire drill procedure, a few pages on preventing contamination and first aid, a map, and a thank-you note. All these pages are numbered and there's a table of contents so they can quickly find whatever they need. I think I've provided everything a sub will need but the lesson plans with this, and subs always seem to be very appreciative.