About
KnowHowSupply
KnowHowSupply is a small US digital-products business. We sell unofficial study guides and printable tools for exam candidates and for everyday life-admin tasks.
The catalog is 16 unofficial PDF study guides — 13 fire alarm, NICET, and low-voltage guides, plus a CNA exam study guide, a journeyman electrician calculations workbook, and a real estate exam math workbook — and a free 40-question unofficial CNA practice quiz. There is also the Holiday Gift Budget Planner 2026 spreadsheet and two humorous how-to guides: How to Make Toast and How to Send an Email.
There is also a free 40-question unofficial CNA practice quiz. A paid interactive CNA exam-prep web app is planned.
Disclaimers
Unofficial. All exam-prep content on this site is unofficial study material. It is not issued by an exam vendor, licensing board, or standards body.
Not exam questions. These are not real or recalled exam questions.
Non-affiliation. Not affiliated with Credentia, NNAAP, NCSBN, NICET, NFPA, EPA, or any state board.
AI use. Content and tools were created with AI assistance and source-checked by the creator.
Where to buy
Digital study guides can be bought directly on this site with secure Stripe checkout, or through the Etsy shop and the Payhip store.