Built by a teacher, for the founding cohort. Free founding access. No card.
For NSW Teachers · The Cost Of The Pile

The marking pile has a number. Here's yours.

Put in your own classes and minutes, and see the hours your marking and reports quietly cost you each year. Nothing you type ever leaves your computer.

Start here
Runs in your browser. Nothing you type is sent anywhere.
Pop a few of your own numbers in above, then press Add up my year.
≈ 0 hours a year
your marking and reporting, added up across four terms
0
marking hours / year
0
report hours / year
0
= evenings (2.5h each)
0
= weekends of work
0
= full work-weeks (38h)
0
pieces marked / year

Open Period drafts that first version, a calibrated first pass on every piece, so your hours go to the decisions, not the keyboard. You approve every word.

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Your numbers, your maths: a rough picture to make the invisible visible, not a precise audit.

Free for the founding cohort · no card · you approve every word
Built by a teacher Data stays on your computer You approve every word
4
terms of marking and reports, added up at once
0
of your numbers leave your computer
2
jobs counted: marking and report comments
100%
your own figures, your own maths
What The Number Is Really Made Of

Almost none of those hours are the judgement. Most of it is typing the first version.

The on-balance call, the read of this particular student, that is the part only you can make. Open Period drafts the first pass so your hours go to the decision, not the keyboard.

Where the time actually goes.

Mostly into typing first drafts of feedback, report comments and parent emails. That is the part a tool can draft for you to edit and approve.

The judgement stays yours.

The on-balance call and the read of this particular student stays the part only you can make. The calculator deliberately does not try to count that away.

A first pass, not a final answer.

Feedback only for Years 7 to 11, bands for Year 12. Grounded in the student's own writing, with the reasoning shown, for you to change and approve.

Promising, not promised.

No tool can promise a figure, and we will not pretend to. How much time you get back varies by class, subject and how you work. You always read, change and approve.

Get Those Hours Back

Built around the standards you already answer to

Australian Framework for Generative AI in Schools Australian Curriculum v9 NSW English & NESA
FAQ

The marking maths, answered straight.

Is this just a guilt-trip number?
No. It is your own maths from your own numbers, built to make an invisible cost visible, not to make you feel bad about it. The hours are real work that someone has to do. The point is to see them clearly, then decide which part of them only you can do.
Where does the time actually go?
Mostly into typing first drafts of feedback, report comments and parent emails. That is the part a tool can draft for you to edit and approve. The judgement, the on-balance call and the read of this particular student, stays the part only you can make, and the calculator deliberately does not try to count that away.
Is my data private?
Yes. This calculator runs entirely in your browser, so your numbers never leave your computer and nothing is stored. The full Open Period tool goes further: it strips names and identifiers before any text reaches the AI, and you approve every word. Get the privacy and approval pack for your school →
Does Open Period actually save that whole number?
Honestly: no tool can promise a figure, and we will not pretend to. What the full tool does is draft the first pass, so your time goes to the judgement instead of the keyboard. How much time that gives back varies by class, subject and how you work: promising, not promised. You will always be the one reading, changing and approving.
What does it cost?
Right now you are joining the founding list, which is free. Leave your email and you will be first in when we open, with free founding access for early teachers. No card, no price, nothing recurring to join.
For Your School

Get the approval pack for your Head of Department.

The privacy is in the architecture, not just the promise. Take the one-page proposal and the data flow straight to your head teacher.

Get My School Approval Pack
Be First In Line

Want those hours back?

The full tool drafts the first pass on your marking, reports and parent emails, privately, on your computer, with names stripped before anything reaches the AI. You read, change and approve every word. Leave your email to be first in when it opens.

✓ Free for two weeks, no card
✓ Keep everything you make
✓ Free founding access for early teachers
Founding Bonus

We set up your calibration with you

Your marked samples are our job, not your evening. You start with the first pass already tuned to how you mark.

Founding Bonus

A marking-codes starter pack

Ready-to-use feedback codes like Strength, Run-on and Next, so your first pass speaks your shorthand from day one.

Founding access is for the first cohort only. When it fills, the free-at-launch place closes. Leaving your email now holds yours.