Editorial standards
Expert reviewers & editorial team
Licensing exams are high-stakes, so it matters who stands behind the material. Our questions and guides are written by our founder and reviewed, where we have one, by a real state-licensed professional. Every license below is public — click through and verify it yourself on the issuing board's own lookup.
Our review is real but scoped, and this page is where you can see the scope. 4 of the 7 verticals we publish in have a licensed reviewer; the rest say so plainly instead of quietly going missing. Content in a vertical with no reviewer carries our org-level editorial byline, not a professional sign-off — and you should weigh it accordingly.
Written & maintained by
Sen Lin
Founder, PrepPassSoftware engineer and founder of PrepPass. Built the bilingual license-exam question banks and has first-hand experience helping students pass the California CSLB Business & Law, real estate salesperson, and insurance licensing exams. (Founder and author — not a claimed licensed professional; professional accuracy is handled by the reviewers below.)
LinkedIn ↗Reviewers by vertical
Construction & trades
Contractor licensing exams — CSLB Law & Business, General Building, and the trade classifications.
Abraham Chen
Verified licenseLicensed California General Contractor
Reviewed: CSLB Law & Business and General Building (B) exam prep
Same person, also licensed: NMLS Mortgage Loan Originator #2099286. Each license covers only its own vertical.
Abraham Chen
Verified licenseLicensed California Electrical Contractor (C-10)
Reviewed: CSLB C-10 electrical contractor exam prep
Healthcare & nursing
No licensed reviewer yetNCLEX-RN and NCLEX-PN, TEAS, HESI A2, CNA, PTCB, CCMA, phlebotomy and the allied-health certifications.
Reviewer being onboarded
No licensed professional has signed off on this vertical yet. Its pages carry our org-level editorial byline and are fact-checked against the exam authority's own published material, but they have not had a professional review. We would rather tell you that than let the gap go unmentioned.
Finance & securities
Mortgage loan origination (NMLS/SAFE), the FINRA Series exams, and the accounting/enrolled-agent credentials.
Abraham Chen
Verified licenseLicensed Mortgage Loan Originator
Reviewed: NMLS mortgage loan originator exam prep
Same person, also licensed: CSLB General Contractor #1101856 · CSLB C-10 Electrical #1142431. Each license covers only its own vertical.
Insurance
Life & Health and Property & Casualty licensing exams, national plus the state variants.
John Zihao Zhang
Verified licenseCalifornia-Licensed Life Insurance Agent
Reviewed: Life & Health insurance licensing exam prep — the national hub and all state variants. Life & Health ONLY: Property & Casualty and personal-lines content is not covered by this license and has not been reviewed by him.
Food safety
No licensed reviewer yetServSafe Manager and Food Handler, NYC Food Protection, and the state/county food-handler cards.
Reviewer being onboarded
No licensed professional has signed off on this vertical yet. Its pages carry our org-level editorial byline and are fact-checked against the exam authority's own published material, but they have not had a professional review. We would rather tell you that than let the gap go unmentioned.
Real estate
Salesperson and broker licensing exams, national plus the state variants.
John Zihao Zhang
Verified licenseLicensed California Real Estate Salesperson
Reviewed: California real estate salesperson exam prep
Military & academic
No licensed reviewer yetASVAB, the academic admissions tests, and the professional/graduate entrance exams.
Reviewer being onboarded
No licensed professional has signed off on this vertical yet. Its pages carry our org-level editorial byline and are fact-checked against the exam authority's own published material, but they have not had a professional review. We would rather tell you that than let the gap go unmentioned.
How we verify every fact
Every number and rule is cross-checked against the official board or statute — read our full review process.
Our editorial process →Last updated: September 2026— licenses last checked by hand on the issuing boards' public lookups that month.