How we write and check every question

The questions on this site are written and checked with AI models, from each state's official driver handbook, and every step leaves a record. This page explains the process and what it does not cover.

1. One handbook per state

We download the state's current driver handbook, record its exact file fingerprint, and split it into pages. Questions may only use that handbook, and each one must cite the page it comes from. If a state publishes a new edition, every question citing the old one is checked again before it can stay in a test.

2. Writing

An AI model (Claude Sonnet 5.5) reads the handbook a few pages at a time and writes multiple-choice questions about what those pages say, each with an explanation and its page reference. It is told to write about driving, not about the handbook itself, and to drop anything it cannot support from the text.

3. A blind second check

A different model (Claude Opus 5.5) answers every question using only the cited page and the pages either side of it, without being told the intended answer. A question goes live only when that check picks the same answer, finds it clearly supported by the text, sees no second defensible option, and reports no other defect. Everything else is held back for review.

4. Copy and source checks

Questions that repeat twelve or more words in a row from anywhere in the handbook are held back, so the site teaches the rules in its own words. Some handbooks include their own quiz pages without an answer key; questions built on those pages are excluded too.

5. People

The site owner reviews flagged questions and samples of verified ones as time allows. Every question has a "Report a mistake" link; reports go to a review queue, and a corrected or removed question is replaced in its test without reshuffling the rest.

6. Spanish translations

Spanish versions are translated from the verified English questions, then checked twice more: a different model answers the Spanish question blind from the handbook page, and a second review compares it with the English original and rejects any change of meaning. A translation goes live only if it passes both. Read this page in Spanish.

Where each state stands

What this does not guarantee

The checks catch questions the handbook does not support, but they cannot catch a handbook that is out of date, and no practice test can promise the questions you will see. Laws change; your state agency and its current handbook are the final word. If something here looks wrong, please report it.