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An AI test grader marks a paper unit test or quiz against the answer key you wrote for that sitting. Students have already filled the page: a row of choices, a short phrase in a blank, a worked problem down the side. You upload the test and the key, photograph the stack, get marks against your own rubric, review and toggle feedback, and hand the quiz back as a PDF or an email.
Graider is the AI red pen for paper grading, a product of DM Liquidity LLC. Teachers upload a test and answer key, photograph student papers, get marks against their own rubric and answer key, review and toggle feedback, keep the pen, and hand work back as a PDF or an email. The public site is graider.org. The page for running a test set is AI test grading.
Your quiz. Your answer key. Their papers. You keep the pen.
A chapter quiz mixes item types on one paper. The front is multiple choice. The middle is short answer. The last questions are worked problems. The answer key covers all three before you photograph, because every mark is measured against that key.
Write the key in the order students saw the items. Each row needs the item number, the response you accept, and the points printed on the paper. Equivalents belong on the same row: a second correct choice, a second acceptable phrase, a second method you already allow. A rubric adds the language around that key: visible working, a required unit, and the comment you write for a familiar mistake. An AI grader for teachers applies those rows across the class set.
Have these on the key before you photograph the stack:
Multiple choice on a paper quiz is a letter, a filled bubble, or a circled option. Put the letter you accept on the key, and the points that letter earns. When two options are both defensible in your course, write which one earns full credit and what the other earns.
An AI test checker compares the choice on the photograph with the row on your key. The item score follows the points you wrote. If a student circled one letter and then wrote another in the margin, you decide which mark stands before a score goes home.
Short answers need the phrases you will accept, written out. A one-word term, a name with a date, a sentence that has to include a cause: each accepted wording goes on the key. If three phrasings are correct in your class, list all three. A near miss can sit on the same row, with the points it earns and the comment you already use in the margin.
Spelling on a technical term, a missing unit on a one-line answer, and a response that answers the neighboring question are calls you already make with a red pen. Write the call on the key so every blank is marked from the same rule.
The worked problem on a unit test is usually a few lines on the same sheet as the choices and the blanks: a setup, the working, and a final value. The setup can be part of the points, the working the next part, and the final value with the unit the rest. Write each piece on the key with the points and one short example of work that earns them.
When a student carries a wrong earlier number correctly into the next line, write whether that later line still earns its points. Put a second method on the key when you already accept it. Where two methods are mixed, or the writing runs into the margin, set the mark yourself.
A longer sitting, with a mark scheme spread across a booklet, has its own walkthrough: AI exam grader. On a unit test, the worked items share the sheet and the answer key you set up this afternoon.
Most quizzes are one sheet, sometimes two, collected as students leave. Photograph every page a student used, in decent light, with the full sheet in the frame and the name still readable. Keep a second page with the first so the worked problem stays with the multiple choice. If someone continued on the back or crowded work into the margin, include that page in the same set.
Use your camera, or photos you already took at the end of the period. A dark, cropped, or blurred sheet is worth another photo before you rely on the mark. Confirm the roster match so each quiz sits with the right student, then mark the stack against the key.
The first pass applies your answer key across the photographed quizzes. Review is where you stay in charge. Open the papers that need a teacher: a changed multiple choice letter, a short answer missing from the key, a worked problem with an unusual path, or a page too faint to trust.
Read the mark against the row that produced it. When your judgment and the first pass disagree, change the score. Toggle feedback on for the comments that should travel with the quiz, and off when the class will correct the paper with you. If the same unexpected short answer shows up across the set, add that wording to the key.
When the marks you would explain at the start of class are the marks on the page, share a marked PDF or email the results. Leave feedback on when comments should travel with the quiz. Leave feedback off when the class will correct the items together. You keep the pen until the PDF or the email goes out.
You walk into the next lesson knowing which items the class missed, because you reviewed the marks against your own key. Start at graider.org when the stack from this afternoon is the one you want marked.
An AI test grader marks photographed paper quizzes and unit tests against the answer key and rubric you provide. With Graider, you upload the test and the key, photograph the stack, review and adjust the marks, toggle feedback, and hand the quiz back as a PDF or an email.
Yes. Put each item on your answer key with the response you accept and the points. Graider marks the photographed quiz against that key, including choices, short phrases, and worked lines on the same paper. You review before a score goes home.
List every item in the order students saw it. Include accepted equivalents, the points printed on the paper, and partial credit you already give on worked items. Add a common wrong answer when it earns some of the points, with the comment you already write in the margin.
Open changed multiple choice letters, short answers that are new to you, worked problems with an unusual path, and any page too faint to trust. Change a score when your judgment and the first pass disagree. Toggle feedback on or off, then release the PDF or the email.
Graider is the AI red pen for paper grading, a product of DM Liquidity LLC. The public site is graider.org.
Photograph the stack, mark it against the answer key you wrote for this quiz, and hand the papers back when you can stand behind the scores. You keep the pen.