A real worksheet, graded — and which answers were proved rather than read. See it graded →
Class Margin

Product

How Class Margin works

The short version: it does the reading and the arithmetic, and asks you about everything it cannot prove for itself.

01You photographA stack, in any order. No names, no assignment.
02It readsIn the background, while you carry on shooting.
03It groupsPapers cluster by worksheet and match an existing key.
04It checks itselfPlain arithmetic is recomputed. Anything it cannot prove is flagged.
05You confirmThe flagged ones. Then you mark the paper final — only a person can.

Two of the five steps are yours, and they are the two that need judgment.

Scanning

Photograph a whole stack into a class without choosing an assignment first. Each upload returns as soon as the picture is stored, so photographing twenty papers takes as long as twenty photographs — the reading runs in the background and results appear as they finish.

If a worksheet runs to more than one page, set pages per paper and the stack is split accordingly.

Recognizing the assignment

Every paper that is read gets a fingerprint made from the wording of its questions. Unfiled papers are clustered by that fingerprint, so a mixed stack separates itself into worksheets.

Each group is then compared with the answer keys already in the class. If it matches one, you are asked to confirm — once for the group, not once per paper. If it matches nothing, you can create an assignment from the group and the answer key is drafted from the papers themselves.

Answer keys you do not have to proof-read

A proposed key is checked before you see it. Plain arithmetic is recomputed independently: if the proposed answer to 34 + 18 = is 52, that is proved, not trusted, and needs no reading. A disagreement is flagged with the computed answer offered as a one-tap correction.

Answers that cannot be verified — a matching letter, a vocabulary word — are shown with how clearly they were read, and say plainly that they could not be checked.

Grading

Papers are graded against the confirmed key. Equivalent forms count where you allow them, so 1/2 and 0.5 can both be right. Spelling and handwriting are ignored by default.

Partial credit for shown work can be switched on for a whole assignment, or granted to an individual student through their accommodations card.

Written answers

Writing is assessed, never scored. Capitalization, end punctuation and length are counted and reported as plain statements you can check. Ideas, organization and vocabulary are not scored at all — you get a suggested range out of the available scores and the reasons behind it.

A poor photograph never costs a student scores. If the handwriting could not be read reliably, nothing is assessed and you are told to look at the photograph yourself. Grading an unreliable transcription would grade the camera rather than the child.

Expectations scale with the grade level, and each class can move the bar — word count, sentence count, or the mechanics target — because a grade level is not the same standard in every school.

Review and export

Papers that need a human are listed first: no name matched, low confidence, an answer key not yet confirmed, or an accommodations card applied. Everything else waits quietly. Open any paper to see the photograph full size beside the scores.

When you are satisfied, mark papers final and export a CSV aligned to your roster: student number, name, assignment, points earned, points possible, percentage and status.