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AI math grading on a paper test starts with the working students show, the methods you accept, and the partial credit you already give. One student sets up a proportion. Another uses a unit rate. Both can be right in your class. A third misses the first equation and then does the later algebra correctly on that wrong number. You already know which lines earn method marks, and which line loses the accuracy mark.
That working is what a photo has to carry: the setup, the substitution, the unit, the labeled graph. A correct answer with no work can be a fraction of the points, when that is your rule. A wrong answer with a clear setup can still earn the method marks. Part (b) often uses part (a). The final value can match the key while the method is one you do not teach, or the method can be sound while the last line slips.
Error carried forward, often called follow-through, means the student used their own earlier number correctly in the next part. You might award the later method marks, award them only when the earlier method was sound, or start the later part from the value on the key. If you accept two methods, such as substitution and elimination, both belong on the key. If you accept only the method from the notes, write that border too.
Your test. Your method marks. Their papers. You keep the pen.
Write the key the way you would explain a mark at your desk. Each question needs the points, the steps that earn them, and a short example. A second reader with the photo and the key should be able to point at the page for every point awarded.
Note the marks per step. A six-point problem might give one point for the equation from the diagram, two for the algebra, one for the substitution, one for the numeric result, and one for the unit. Name each step in words you can see on the paper.
Partial credit sits on the same row. A correct method with an arithmetic slip can keep the method marks and lose the accuracy mark. A missing unit can cost the final point and keep the rest. A common wrong setup can earn the points you name, with the margin comment you already use.
Follow-through needs its own sentence. When a student carries an earlier number into the next part and does that later work correctly, say whether the later method marks still stand. Also write the case you withhold: the later part ignores the earlier result, or it must start from the value on the key. If follow-through counts only when the earlier method was sound, say so there.
List every method you already accept, with the marks it can earn. A method you have not listed is a mark you set at review. Add units, significant figures, and labels in the same notes.
When those rows are still loose, use how to write a rubric AI can follow, then bring the finished rows back to this math key.
Graider is the AI red pen for paper grading. The teacher stays in charge and keeps the pen. You upload the test and the answer key, photograph the student papers, and Graider marks each page against your own key and rubric. You review, you can change any mark, you toggle feedback, and you hand the set back as a PDF or an email.
That is how you grade math tests with AI on the paper you already wrote. An AI math grader here is a first pass against your standards. You still hold the pen at review.
Photograph every page a student used, in decent light, with the name readable and part (b) kept with part (a). Include the back, a later graph, and algebra in the margin. Confirm the roster match so each script sits with the right student.
The first pass applies your rows: method marks where the step is visible, partial credit where your condition is met, and follow-through where a carried error still earns the later marks. Then you review. Change the score when your judgment and the first pass disagree. The mark you release is the one you choose. Toggle feedback on when the comment should travel with the paper, and off when the class will correct the item with you. The PDF or the email goes out when you say so.
Running a paper class set starts at AI test grading. A mixed quiz beside a few worked lines has its own walkthrough: AI test grader for paper quizzes and unit tests.
Some pages need a teacher even when the key is clear. If you cannot read the working, the mark waits until you can. A dark photo, a cropped corner, or faded pencil may need another photo before you stand behind the score.
A student can use a method you accept and did not write on the key. Set that mark yourself. Add the method, with its points, when the next class should treat it as ordinary.
Diagrams and graphs often hold the reasoning: a triangle sketch, a number line, a parabola, a bar graph with a scale. Labels can be right while a curve is off. Check it yourself when the figure is new, when a carried error changes the later part, or when two methods share a line.
Here is a practical pass for one class of math tests.
You walk into the next lesson with marks you can explain, because they came from your key and from the review you just finished. You keep the pen.
AI math grading marks photographed paper math tests against your key and rubric, including method marks and partial credit. Upload the test and key, photograph the stack, review and change any mark, then hand work back as a PDF or an email. You keep the pen.
Yes. Put the condition, the points, the method marks, and any follow-through on your answer key. Graider marks the photographed papers against that key. You can change any score before a paper goes home.
Name the step a second reader could find on the page, the points it earns, and a short example of work that earns them. Say what still earns the method marks when the final value is wrong. List each method you already accept, such as substitution and elimination, with the marks it can earn.
Illegible working, a method you accept and did not list, and diagrams or graphs. Recheck a dark or cropped photo. Change the mark when you disagree with the first pass.
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 method marks and partial credit on your own key, and hand the papers back when you can stand behind the scores. You keep the pen.