Persistent shared canvas for online classrooms

An instructor runs a recurring online class — same students, same conferencing link, week after week. Every session, the whiteboard starts blank. Diagrams built last week are gone. Images the instructor wanted to paste in as reference material have to be re-uploaded each time. There's no notion of a 'room' that accumulates context across sessions.

This is a structural problem, not a bug. Video conferencing software is built around the metaphor of a meeting — a discrete, ephemeral event. A classroom is the opposite: it's a continuous relationship between a teacher and a group of students where context compounds over time. No video conferencing vendor will fundamentally rearchitect around this metaphor because their largest customers are corporations running one-off meetings, not teachers running semester-long courses.

The specific complaints that point to this: drawings disappear when switching from whiteboard to presentation, there's no way to paste images onto the whiteboard for reference, and the whiteboard is described as not suitable for 'creating pictures and diagrams' — implying users want to build something that lives beyond a single session. These aren't requests for more drawing tools; they're requests for persistence and context.

A persistent shared canvas tied to a recurring class — where each session starts with last week's work still visible, where images and diagrams are organized by topic or date, and where students can annotate asynchronously between sessions — is something no conferencing tool offers because it requires a data model entirely different from a meeting record. Schools and tutoring centers that run structured recurring programs would pay for this as a teaching continuity tool, not a whiteboard. That framing matters: the buyer is an academic operations manager or school owner, not just a teacher, which means a B2B sale at a higher price point.

What to build

Build a web app where teachers create persistent canvas 'rooms' linked to a recurring class, each room storing layered drawings, pasted images, and typed math notation across sessions, with a join link that opens a synchronized view for students inside their existing conferencing session via a side-by-side browser tab.

Where to start

Partner with one tutoring franchise or one online language school that already runs dozens of recurring classes — offer the first cohort free in exchange for a case study and internal referral, which gives you both the usage data to improve the product and a warm distribution channel into their teacher network.

The hard part

Selling to small tutoring center owners means the sales cycle is short but the budget is tight — you'll need to price it low enough to close without a procurement process, but that means you need volume before it's a real business, which requires distribution you don't have yet.

How it makes money

Per-classroom monthly fee (e.g., $8/active classroom/month) billed to the school or center, not per student — scales naturally as the school adds more recurring classes.