Nobody can read anything in your planbook—not even your principal—until you share it.
Private by default, shared on your terms — and sub plans and catch-up packets draft themselves from what you were already teaching.
Planbook is a teacher-owned planner. It is private by default, which makes it the honest version — and because it is honest, the sub packet and the missed-work packet it produces are the real ones.
Try it free
How it works
Create a planbook for each course you teach — including one you are only planning for next year.
Jot what you taught, or accept the suggestion when the gradebook already knows something was due. Copy a day across your sections, then change the ones that need changing.
Publish the handouts you would give a student anyway. Those, and only those, appear in the course library.
What Planbook does
Sub plans that draft themselves from what you were already teaching.
So a sick day doesn't start with writing sub plans at 6am.
A student was out. The office prints what they missed — without finding you.
So an absence doesn't turn into three emails asking you for the handout.

Sound familiar?
- “The minute plans get collected, everyone writes the version that looks good.”
- “I'm writing sub plans at 6am while I'm sick.”
- “Every absence turns into three emails asking me for the handout.”
Planbook removes all three.
What you're using now
Lesson plans live in a binder that gets collected, or a doc shared with the whole building — so teachers write two versions: the honest one and the one for the audience. Planbook is private by default, which makes it the honest one. Sharing is yours to grant, and the sub packet comes out of the real plans without a second version of anything.
Every Binder app works like this
Built for your phone first
Every screen works in a hallway, not just at a desk.
Paper is a first-class input
Point your camera at a roster, a sign-out sheet, a stack of work — Binder drafts, you approve.
Your district's words
Labels and letters render in your district's own terminology.
AI drafts, people decide
Nothing becomes a record until a person says so.
More on how Binder works: the platform · security & privacy
Every Feature You'd Expect. Every Feature You'll Need.
The ordinary things a tool like this has to do. Listed so you can check them off.
- A planbook per course, including next year's
- Units and materials
- Copy a day across your sections
- A published course library for students and families
- Sub plans and missed-work packets
Questions people actually ask
Can my principal see my lesson plans?
No. Planbook is private to you. The only things that leave are materials you deliberately publish, a sub plan you save, or a packet you build.
Is there a planning-compliance report for administrators?
No, and there will not be one.
What reaches families?
Only what you publish, and only as a packet somebody assembles on purpose.
14 days, no credit card, nothing to install. Explore with sample data, or bring your own roster.