I'm Scott, a pre-service English teacher training at ACU. I'm building Open Period in the open, and this is the honest account of why.
What I saw on placementThe marking pile that never shrinks.
On placement, the thing I couldn't stop noticing wasn't in any lesson plan. It was the pile. The stack of drafts and books and submissions that never quite shrinks, because for every batch you clear, another lands. The evenings, meanwhile, do shrink. They get eaten, one at a time, by the part of teaching nobody sees.
And here's the part that stayed with me: when the night runs short, it's the feedback that gets cut first, not the tick or the band. The actual comment, the sentence that tells a student what to do next with their writing, is the one part that genuinely moves their work forward. So the most valuable thing a teacher writes is the first thing the clock takes away.
I watched genuinely good teachers make that trade, not because they didn't care, but because there are only so many hours in a Sunday. That's the maths I couldn't unsee.
The line I wouldn't crossI didn't want a tool that marked for teachers.
So the obvious idea is: have a machine do the marking. I won't build that, and I want to be plain about why.
The judgement is the job. Deciding what a piece of writing is worth, what a student needs to hear, and how to say it so they'll act on it: that's the professional work, and it has to stay with the human who knows the child. A tool that quietly makes those calls for you isn't help. It's a liability dressed up as convenience.
My line is simple: AI assists, a human decides. The judgement stays yours, start to finish. If a feature ever blurred that, it doesn't ship.
What I builtA calibrated first pass: the boring half, given back.
What's left, once you protect the judgement, is the typing. The re-phrasing of the same encouragement for the twelfth time. The turning of rough margin-notes into something a parent can read. The blank-page friction before the real thinking starts.
That's what Open Period does: a calibrated first pass. You brief it, it drafts, and you're handed a starting point instead of a blank page. The deciding, which is the part that matters, is still yours. It just gives the boring half back.
The promises I built inFour things that aren't up for negotiation.
Because this touches students and trust, I built the guardrails in from the start, not bolted on after:
Your students' data never leaves your computer. The work stays in your browser, and identifying details are stripped before anything reaches the AI. You approve every word before it goes anywhere near a student, a parent, or a report. Any band is an estimate for drafting, a working guess to help you write, never an official mark. And I show my working instead of claiming accuracy I can't prove. You see how a draft was reached, so you can trust your own check, not my marketing.