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For high school English teachers

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Get a calibrated first pass on every draft: a band with the reasoning, notes in your voice, every quotation checked against your set text. You read, adjust, and hand it back. The judgement stays yours.

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Band 5
Module A, first pass
✓ de-identified · 1 name replaced

Both Shelley and the film interrogate what it means to create life without accepting the duties of a creator. Frankenstein flees the creature he animates, and Tyrell builds replicants to serve and then expire, so both stage abandonment as the true monstrosity. This shows the composers warn us about ambition.

Strength You track the effect on meaning, not just the device.
ROS One idea per sentence; split where Tyrell enters the conversation.
Next Tie "warn" to the exact wording of the question.
Why Band 5: sustained, well-supported analysis across both texts; tighten expression and anchor each point to the question to push into Band 6.
Free to try
80 verified evidence sources
Calibrated to your own standard
Teacher always in the loop
Privacy you can see, every output
See it on real work

Worked examples — click through.

Every tool, shown on the kind of marking and admin that actually eats your week.

01 · Mark a draft

A calibrated first pass

A band with the reasoning and notes in your voice — you review and approve.
Student draft

"Both texts show how power corrupts. The composer uses symbolism to show this and it makes the responder think about society."

First pass  Band 3
  • ROS — name the symbol and its effect, not just the device.
  • Next — tie "society" to the exact words of the question.
  • Why Band 3 — clear thesis, thin textual support; add evidence to lift it.
02 · Differentiation

One task, three levels

Support, core and extension from your own materials — ready to print.
Your task

"Write a paragraph analysing how the poet conveys grief."

Three versions
  • Support — sentence starters + the quote chosen for them.
  • Core — the task as written, with a success checklist.
  • Extension — compare grief across two poems and evaluate.
03 · Parent & carer emails

The email you've rewritten in your head

Firm on the issue, warm to the family.
Your rough note

"jack hasnt handed in last 2 tasks, distracted in class, want to loop parents in"

Drafted email

"Dear Mr & Mrs Lee, I'm writing about Jack's recent English work. Two assessment tasks are outstanding and I've noticed his focus slip in class. I'd love to work together to get him back on track — could we find a time to talk this week?"

04 · Report comments

Rough notes → a polished comment

Three structurally different drafts per student. You pick the spine.
Your notes

"good analysis, weak on quotes, improved this term, needs to plan before writing"

Comment

"Mia analyses texts with growing insight and has made pleasing progress this term. Her next step is to support ideas with well-chosen evidence and to plan before drafting, which will sharpen her structure."

05 · Quotation checking

Every quote checked against your set text

Misquotes flagged before you hand feedback back — on your computer.
In the draft

As Macbeth says, "is this a dagger I see in front of me"…

Flagged

⚠ Misquote. The set text reads "Is this a dagger which I see before me" (Act 2, Sc 1) — corrected before it reaches the student.

The whole toolkit, free for fourteen days

Everything you can do. And every bit of it is free to try.

All free · no card

Marking, feedback, differentiation, emails, reports and more. The entire product, nothing held back, free for your first two weeks. Use it on a real week of work before you decide a single thing.

01

Draft feedback free

A calibrated first pass on every draft: a band with the reasoning, named strengths and prioritised next steps. You review and approve.

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02

Lesson differentiation free

Any task at three levels: support, standard and extension, grounded in your own materials. One press makes printable worksheets.

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03

Parent and carer emails free

The email you have rewritten four times in your head, drafted calmly and professionally. Firm on the issue, warm to the family.

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04

Report comments free

Three structurally distinct drafts per student: achievement first, character first, trajectory first. You pick the spine.

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05

Quotation checking free

Every quotation in a draft checked against your set text, on your computer. Misquotes are flagged before you hand feedback back.

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06

A whole class set at once free

Add the class, press once. Each draft gets its first pass in turn, with a whole class patterns sheet for next lesson.

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07

Lesson slideshows free

A structured lesson deck from your topic and materials, exported straight to PowerPoint. Built for the projector you actually have.

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08

Syllabus check new · free

Paste your program and the new outcomes. Get an honest audit, covered, partial, missing, with rewrite priorities for 2026.

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Every tool above is free to try. Fourteen days, fifty actions, no card, nothing recurring.

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Calibrated to you

Calibrated to you. And we show our working.

Upload work you have already graded, and the first pass calibrates to the standard you actually apply, module by module. Not a faceless average. Your standard, in your voice.

No tool can legally calibrate to NESA's marked sample answers, so anyone claiming it is guessing. We do the honest thing instead: we calibrate to the published standard and to your own marking, and we publish how often we agree rather than asking you to take our word.

Every teacher who marks with it sharpens the calibration. That shared record is the one thing a competitor cannot copy.

About the maker

Built by a teacher who did the marking maths.

I am an English teacher in training, finishing my degree at ACU. I built Open Period because I watched the maths up close. The pile that never shrinks. The evenings that do. And the feedback, the part that actually moves a student's writing, cut first every single time.

I did not want a tool that marked for teachers. I wanted one that gave the boring half of the work back and left the judgement exactly where it belongs: with you.

80 sourcesverified evidence base
Regression testedbefore every release
Alignedwith the national framework
A trial cohortmarking with it now
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Open Period is opening to a first group of NSW English teachers. Leave your email and you'll be first to know the moment it opens — with free founding access for early teachers.

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Fair questions

Asked by teachers. Answered straight.

Is everything really free to try?
Yes. Every tool, marking, feedback, differentiation, emails, reports, slideshows, syllabus check, is open during your fourteen day trial, with fifty AI actions, no card and nothing recurring. At the limit it simply stops, and everything you made stays in your browser.
Is this cheating? Am I still the one marking?
You are the assessing teacher, full stop. Open Period produces a first pass, a draft judgement with its reasoning shown, for you to review, change, and approve. That teacher in the loop design aligns with the Australian Framework for Generative AI in Schools: AI assists, a human decides.
Is student work safe?
Names and identifiers are stripped before anything reaches the AI, once in the app, again on the server, with the count shown on every output. We do not store drafts, feedback, or prompt content. Your work lives in your own browser. De-identified text is processed by Anthropic under commercial API terms and is not used to train AI models. Always follow your school system's AI policy as well.
How do I know the band is not just made up?
The logic is anchored to the published NSW standards module by module, in our own words, and re-tested against a band tagged exemplar set before every release. No tool can legally calibrate to NESA's own sample answers, so anyone claiming that is guessing; we calibrate to the standard and to your own marking, then show our agreement instead of claiming it. After each mark you record the band you would give, and we publish how often the first pass lands within one band of your judgement, sample size shown. Even two human markers rarely agree on the exact band, so within one band is the honest measure. Any band it gives is an estimate for drafting and practice, never an official mark.
Why pay when ChatGPT is free?
A general chatbot is not calibrated to NSW standards, can give a different answer each time, can invent quotations, and pasting student work into it sits badly with most school policies. Open Period is the narrow opposite: module aware calibration that is regression tested, quotation checking against the actual set text, feedback in your own voice, and de-identification you can see.