The Challenge
Walk into a room of students who don't know you, who may feel they owe you nothing, and who are quietly deciding whether you're worth their attention — all within a single class period.
That's the real work of substitute teaching, or guest teaching as it's also called. It's rarely taught, and rarely supported.
subin was built by someone who has lived it.
“Credibility is built through action. Legitimacy is granted by those you serve.”
The principle subin is built on.
The Tools
Two tools, ready the moment you need them.
01
Game Plan
Opening move, period structure, re-engagement prompts, bright spot setup, and answer key — generated in seconds.
02
Back Pocket
Jokes, quotes, history facts, discussion starters, and brain teasers — filtered to your grade level.
Set the room
In seconds
Walk in with the plan
Resources on hand
How it works
Grade, subject, and how charged the room is feeling.
A clear, minute-by-minute structure for the period — built in seconds.
Lead the room with confidence — and catch the bright spots.
Those unscripted moments when a student grasps a concept in real time. They're unpredictable, and they're the reward. subin helps you create the conditions for more of them.
The Mission
Substitute teaching is one of the most challenging and least supported roles in education. subin exists to change that: to give substitute teachers the tools the work deserves, and to help schools close the coverage gap with the focus where it belongs: students.
Build your game plan →