Worksheet grader
Photograph a finished worksheet and get it graded, line by line.
Photograph the finished worksheet — up to eight pages.
What the Worksheet grader does
Upload a completed worksheet — up to eight pages — and every question comes back graded: your answer beside the right one, what went wrong where it went wrong, and a note on the pattern across the mistakes. It works each question out itself before it looks at what you wrote, and it shows both answers side by side so a mark you disagree with is easy to spot and argue with.
It is built for the moment a worksheet is finished and nobody is around to check it: a parent at the kitchen table, a student the night before it is due, a teacher with a stack of thirty. Photograph the pages, press Grade it, and the grading arrives in the chat, where you can ask about any line of it.
Every subject a worksheet comes in works: algebra, chemistry, a page of Spanish verbs, reading comprehension. Handwriting is fine. If a question is too faint to read, it says so in that row instead of guessing at what you wrote.
More tools
A calculator, a grapher, a triangle solver, an equation balancer and a Python console. All of them run in your browser, all of them are free, and none of them need an account.
- Essay graderGraded against a real rubric, or reviewed with no score at all.
- Citation generatorAPA, MLA, Chicago and Harvard, with the in-text bracket included.
- Word counterWords, characters, sentences and reading time, live as you type.
- Grammar checkerEvery error listed with the fix and the rule behind it, no rewrite.
- CalculatorA real scientific calculator with a tape of everything you typed.
- Graphing calculatorPlot any function, drag the view around, and read off the roots.
- Triangle solverSet the sides or the angles and watch it draw the triangle for you.
- Equation balancerBalance any reaction and get molar masses from the periodic table.
- Python consoleReal Python running in your browser, with charts and a console.
- SketchpadDraw the diagram or the problem, then ask the tutor about it.
More about the Worksheet grader
The grading comes back as a table with one row per question: the question, what you put, the correct answer in its own column, and a check or a cross. Under it is a score, then two or three sentences on the pattern across the mistakes, which is the part worth reading twice.
You can add up to eight pages before it grades anything, so a three-page assignment is graded as one piece of work. Sign in free and the pages are saved with the grading, so a worksheet can be reopened next week exactly as it was sent.
Why ours is better
It works every question out before it reads your answer.
We measured what happens when a model is shown a confident wrong answer: it agrees with it between 14 and 23 percent of the time. So the grader solves each question itself first, and the correct answer gets its own column, which stops it nodding along to yours.
It grades the whole assignment at once.
Most photo tools take one image and answer one question. This one takes the pages in order and grades them in a single pass, with page numbers, so a multi-page worksheet is not eight separate uploads.
The grading is the start of a conversation, not the end.
Every row can be questioned. Ask why the third one is wrong, ask for a similar problem, ask for a hint on the one you want to retry, all in the same thread, with the pages still attached.
How it was built
The first version got a related-rates question wrong: it said −10/3 ft/s when the answer is 5/6, on a problem the same model gets right when asked cold. The cause was the format. A table cell gives a model no room to think, so it guessed. The grader now has to show one line of working per question before it fills in the table, and that version got every seeded trap right.
Behind the page, each request goes to the cheapest model that scored well enough on our own benchmark of forty hard homework problems and ten degraded phone photos, with the fastest one preferred. That is why grading a worksheet costs a fraction of a cent, and why it is free to try without an account.
Keep what you work on
A free account keeps your questions together by class, remembers what you have covered, and gives you a weekly allowance rather than a daily one.