Write a Sub Plan for Tomorrow: The 15-Minute ChatGPT Workflow for the Morning You Wake Up Sick

Teachers do not skip sick days because they love martyrdom. They skip them because being absent costs more than being ill: the plan takes longer to write than the day takes to survive. That math is now deletable. Here is the workflow, the exact prompt wording, and the privacy rule that keeps all of it FERPA-clean.

Write a sub plan for tomorrow

If that is what you just typed into a chatbot at 5:45 a.m., here is the version that actually works. Step one, give the model context, two minutes: your grade and subject, your schedule with times, what each class is currently studying in one line each, what materials a sub can really use, and your three routines: entry, attention signal, exit. Step two, one prompt, three minutes:

Write a complete sub plan for tomorrow. For each period, give: (1) a 2-line lesson the sub can run with zero subject knowledge, using only the materials listed, connected loosely to our current topic; (2) exact instructions to read aloud; (3) what students turn in, so there is accountability; (4) a 10-minute backup activity if things finish early. Add a header with my schedule and routines, plus blank lines for me to handwrite attendance procedure, helpful students, neighbor teacher, office extension, and emergency procedures location. Under 2 pages.

Step three, the five-minute human pass: fix anything factually wrong about your room, swap any activity your actual class cannot do quietly, handwrite the school-specific lines. Send it, and go back to bed. Every clause in that prompt exists because sub plans fail in specific ways: "zero subject knowledge" kills the plan that assumes the sub can teach your content, "read aloud" kills ambiguity, "turn in" creates the accountability that keeps a room working for a stranger, and the backup absorbs the class that finishes in twenty minutes.

Is it safe to use ChatGPT for sub plans?

Yes, under one rule with no exceptions: no student names or details ever go into the AI. No names, no seating-chart-with-names, no "watch out for so-and-so," no accommodation details tied to a child, no medical information. The plan the AI writes says "see my printed seating chart on the desk" and "accommodation notes are in the sub binder," and those pages exist only on paper in your locked classroom. This split is what keeps the workflow FERPA-conscious: the AI handles structure, which needs no student data, and the paper binder carries the sensitive information it was always going to carry anyway. Put the rule inside your context card itself, and even your sickest 5:45 prompt inherits it automatically.

What goes in a sub binder, and how fast can I build one?

Seven sections, about 40 minutes with AI drafting the generic parts. A welcome page with two warm sentences and your attention signal spelled out; the bell schedule and your duty posts; a people page, neighbor teacher, office contact, two dependable students per class, printed only; procedures, including a kind two-line script for "but our teacher lets us"; the accommodation notes page, handwritten, never AI-drafted; emergency information; and tab 7, the evergreen plans below. The AI drafts the welcome page and procedures from your context card in minutes; you handwrite everything school-specific. A great sub day is this binder plus one fresh page on top, and subs consistently report that the tone-setting welcome page changes their whole day.

What if I am out for several days, or too sick to type at all?

Extend the plan for multi-day, and pre-generate for the worst case. For a multi-day absence, one added prompt does it: each day must stand alone for a different sub, difficulty stays flat, and day one's collected work feeds day two's warm-up so students feel continuity. For the morning you cannot type at all, the answer was built last summer: three evergreen full-day plans, a skills day, a writing-and-thinking day, and a paper-and-voice day that survives a dead projector, generated while healthy, edited once, printed, and filed behind tab 7. If you can manage one phone call to the front office, the binder alone can carry the day.

Want it all done for you?

The whole system is packaged as The AI Sub Plan Emergency Kit: the 9-page emergency workflow guide with tested prompt wording, the editable Sub Binder Template with the matching AI prompt printed beside each section it builds, and the printable 5:45 AM Prompt Card with every prompt on one page, including the multi-day extension. It is six dollars, on purpose: every teacher should own it before the morning they need it.

→ Get The AI Sub Plan Emergency Kit ($5.99)

Want the same approach for your whole teaching week, not just sick days? That is The Teaching Context System, the full AI lesson-planning system built on the same context-card method.

Frequently asked questions

Can a sub plan really be written in 15 minutes?
Yes, if the context comes first. Cold-prompting produces generic filler you will rewrite anyway. A two-minute context paste, the four-requirement prompt, and a five-minute human pass produces a plan a stranger can actually teach.

What is the best AI for writing sub plans?
The free tier of ChatGPT, Claude, or Gemini all handle this; the workflow is deliberately tool-agnostic so nothing goes stale when models update. The differentiator is your context card, not the model.

How do I make a sub plan for a sub with no experience in my subject?
Say it in the prompt: every lesson must run with zero subject knowledge, using read-aloud instructions and collected work. Review stations, structured practice packets, quick-writes with sentence stems, and gallery walks all work without the sub knowing your content.

Can I put my class roster into ChatGPT to make a seating chart for the sub?
No. Student names never enter a consumer AI tool. Print the seating chart yourself and have the AI-written plan reference it: "seating chart is on my desk." Structure from the AI, names on paper only.

What should an emergency sub folder include for multiple days?
Plans where each day stands alone, assume a different sub daily, flat difficulty, and a warm-up on day two built from day one's collected work so students feel continuity. Plus the standing binder: schedule, procedures, people page, accommodation notes on paper, and emergency information.