Produce a complete, self-contained sub plan that any non-specialist can pick up and deliver - clear instructions for the substitute, a starter, a main task with worked examples, an extension, and a full answer sheet so the class stays productive whether or not you're in.
Generate it the night before (or the morning of) a sick day, print it or open it in Google Docs to share, and know the learning continues.
Step-by-step instructions for the covering adult, a settling starter, a substantial main task with examples, an extension for early finishers, and a complete answer sheet - everything needed to run the lesson without subject knowledge.
Yes - that's the point. The instructions and answers are written so any substitute or supervisor can run the lesson confidently.
Under a minute. It's designed for the reality of needing sub plans at short notice.
Both - print a PDF, or open it in Word or Google Docs to share digitally.