Pay for what you use.
Every teacher account starts with 10 free credits. After that you buy credits once and spend them only on the actions that call the AI: writing questions and grading responses. No subscription, nothing recurring, and the price sits on every button before you click it.
Credit packs
Try it on one assignment.
A unit's worth of questions and grading for one class.
A semester for several sections.
Charged once, in US dollars, through Stripe. Credits don't expire. Larger packs cost less per credit.
What each action costs
| Action | Credits | What you get |
|---|---|---|
| Three question suggestions DBQ, LEQ, SAQ or MCQ prompts written to your unit, theme, skill and difficulty. Ask for three more at the same price. |
1 | DBQ, LEQ, SAQ or MCQ prompts written to your unit, theme, skill and difficulty. Ask for three more at the same price. |
| Write a DBQ's seven documents Text excerpts, one real chart and described images, each sourced, for the prompt you picked. |
3 | Text excerpts, one real chart and described images, each sourced, for the prompt you picked. |
| Write an SAQ stimulus The excerpt or data the three parts refer to. |
1 | The excerpt or data the three parts refer to. |
| Write an MCQ set The stimulus plus the answer options and key for every item. |
1 | The stimulus plus the answer options and key for every item. |
| Read a DBQ or LEQ you already have Upload it as a PDF or paste the text; the prompt and each document are pulled out for you to check before saving. Typing a question in yourself is free. |
1 | Upload it as a PDF or paste the text; the prompt and each document are pulled out for you to check before saving. Typing a question in yourself is free. |
| Write three sample essays For a DBQ or LEQ: one essay that earns every rubric point and two that miss specific points, each scored row by row, to show students where marks are won and lost. |
3 | For a DBQ or LEQ: one essay that earns every rubric point and two that miss specific points, each scored row by row, to show students where marks are won and lost. |
| Grade one response A DBQ, LEQ or SAQ scored row by row against the rubric, quoting the sentence behind each point. Multiple-choice is scored automatically and is free. |
1 | A DBQ, LEQ or SAQ scored row by row against the rubric, quoting the sentence behind each point. Multiple-choice is scored automatically and is free. |
| Read a rubric from a PDF Your own rubric transcribed into the form for you to check before saving. |
1 | Your own rubric transcribed into the form for you to check before saving. |
Everything else is free: creating classes, inviting students, editing a question or its documents, assigning it, printing it as a PDF, and students writing and submitting their answers. Saving an LEQ prompt after choosing it is free too, since nothing more is written for it. If an AI call fails partway through, the credits come straight back.
Who pays for grading?
The teacher. Students never see credits or prices. When a student submits a DBQ, LEQ or SAQ, one credit is taken from the teacher's balance and the response is graded on the spot. If the balance is empty the response is saved and waits; grade it from the question page once you've added credits.
What does a class cost in practice?
A DBQ for 30 students is 4 credits to write (suggestions plus the seven documents) and 30 to grade, 34 in all. With the Classroom pack that's about $18, or roughly 52 cents per graded essay. An SAQ for the same class is 32 credits; a multiple-choice set is 2, because scoring it is free.
More questions about accounts, grading and student data are answered on the FAQs page.
Start with 10 free credits.
Teacher accounts are by invitation. Once you're in, write a question and grade a response before spending a dollar.