How we check what we teach

1. Where facts come from

• Signs, signals and pavement markings come from the federal MUTCD (11th Edition, Revision 1 (December 2025)). Every state adopts it, so these questions apply nationwide and cite the section.
• State rules — right-of-way wording, parking distances, headlight distances, alcohol limits, school buses, emergency vehicles — come only from that state's own handbook. On October 12, 2026 we downloaded and read 37 state handbooks page by page; each state question cites its page.
• Licensing facts (agency, permit age, test format) come from agency pages. Each fact records how we read it. Where an agency site blocked our checker and we only saw its text in a search listing, the fact is marked for you to confirm on the agency site — and our exam simulator won't copy that format.
• Safe-driving technique (skids, hydroplaning, blind spots, fatigue) is cited to handbooks that teach it, phrased only as far as those handbooks agree.
• Competitor sites and SEO tools are research inputs only — never a factual source, and we never copy their questions.

2. Who wrote it, and what “source-checked” means

Questions are written in our own words, drafted with AI assistance, and each is tied to a rule record that names the source and the exact location. “Source-checked” means that location was read and matches the answer. It does notmean a human expert has approved the question — AI cannot certify legal accuracy, and we don't pretend it can.

Human review is recorded in a versioned log with the reviewer's name, role and date, bound to the exact wording reviewed; editing a question voids its approval. Approved human reviews so far: 0. Expert review is the next step; until then every answer rests on its cited, quote-verified source.

3. What gets published

• Practice sets include only source-checked or reviewed questions. Drafts and suspended questions never appear.
• A state's practice never includes another state's rules. If we haven't verified a state-specific rule, it is left out, not borrowed.
• Every quoted source passage behind a rule is checked automatically against the official document — word for word, on the cited page — before it ships.
• Our editorial target for a mature state bank is 75 core and 20 visual questions. It is a target — the coverage report shows where each state actually stands (438 questions in total today).

4. When the rules change

Each question depends on rule records, and each rule on a source. When we re-check a source and it has changed — or someone reports a problem — the affected rule is flagged and every question and scene that depends on it is suspended until it is re-checked.

5. Corrections

Every question has a Report an issue button. Reports are anonymous: we ask for no name or email. You can also use our contact page.

6. Copyright

We don't reprint handbooks or agency graphics. Sign drawings are our own, following the federal standard's public-domain shapes and colors. California Driver's Handbook © California DMV, licensed CC BY-NC 4.0. Commercial reuse needs written permission, so we link to it and do not reprint it.Other handbooks' reuse terms are treated as unconfirmed, so we link and paraphrase.

7. What we won't claim

No pass guarantees, no “chance of passing”, no ratings, no student counts, no “official” anything. Our practice exams copy only a state's published length and pass mark; the questions are ours, not the state's.

8. Privacy

Learners may be under 18. Progress is stored only in your browser. Academy pages load no advertising, and analytics record coarse events (such as “quiz finished, state CA”) — never your answers. See our privacy policy.