EZGrader is the cardboard slide chart from the teacher supply catalog, rebuilt as a free web tool. If you’ve ever graded a stack of quizzes by sliding a green card to line up “number of questions” with “number wrong”, this site does the same thing — faster, printable, and without the drawer it disappeared into.

Why this site exists

The original EZ-Grader solved one problem beautifully: the division. Twenty-five questions, six wrong — nobody wants to compute (25−6)/25 × 100 thirty times in a row. But the cardboard version fixed one grading scale and topped out around 95 questions. This version keeps the instant chart and adds what the card couldn’t do: three grading scales (strict, standard, lenient), half-point deductions, up to 200 questions, an optional GPA column, and a printout or CSV you can keep.

Where the numbers come from

The math is elementary — score = (total − wrong) ÷ total × 100 — and the letter-grade thresholds are the published conventions teachers actually use: the 10-point scale (A from 90, pass at 60), the stricter 7-point scale (A from 93, pass at 70) still used in a number of districts, and a lenient scale (A from 85, pass at 50) matching standards-based and minimum-50 policies. Every threshold is printed openly on the letter grade scales page so you can check the chart against your own syllabus. GPA points follow the standard unweighted 4.0 convention (A = 4.0, B = 3.0, F = 0.0).

How the site works

Everything runs in your browser with plain JavaScript. There is no account, no upload, and nothing you type — class size, scores, anything — ever leaves your device. The pages work offline once loaded.

Who maintains it

EZGrader is maintained by Tolerence’s team, which is small, independent, and builds focused utility sites. The standard is simple: numbers a teacher could defend in a department meeting. The browser test checks that 10 questions with 3 wrong score 70% (a C− on the standard scale) and that 75% reads C, D+ or B− on the standard, strict and lenient scales. AI coding and writing assistants helped write the chart script and the scale pages, with the people who run EZGrader setting the direction. Found a threshold your district defines differently, or a feature the chart is missing? Contact us — corrections from working teachers are the emails we answer first.