How we write and check our content
Our sites are only useful if they’re right. This page explains where our information comes from, how we check it, and what happens when someone finds a mistake.
Our principles
- Official sources first. Rules, rates and numbers come from the government body that sets them, not from other prep or calculator sites.
- Our own words. Questions, explanations, lessons and guides are written by us. We don’t copy other sites’ question banks or wording.
- Dated and versioned. Every rule set we use carries the date it takes effect and the date we last checked it, so outdated numbers are easy to spot.
- Clear about limits. Each site says what it doesn’t cover. A practice exam isn’t a copy of the real test, and an estimate isn’t advice.
Sources for each site
| Site | Main sources |
|---|---|
| Ontario G1 Driver’s Test Prep | The Official MTO Driver’s Handbook on ontario.ca for rules, signs and numbers; DriveTest and ontario.ca for test format, fees and licensing steps. |
| Canadian Citizenship Test Prep | Discover Canada: The Rights and Responsibilities of Citizenship, and Immigration, Refugees and Citizenship Canada (IRCC) for the test format and eligibility. |
| Canadian Take-Home Pay Calculator | Canada Revenue Agency and Revenu Québec tax tables, and the CPP, QPP, EI and QPIP rates and maximums for the tax year. |
| Canadian Mortgage Calculator | Financial Consumer Agency of Canada (down payment rules), CMHC (mortgage insurance premiums and debt service limits), OSFI (minimum qualifying rate) and provincial and municipal land transfer tax schedules. |
| Brain and Senses | Fixed, versioned item sets and scoring rules, published in full on the site’s methodology page. These are challenges for fun and practice, not medical, hearing or vision tests. |
| Sleep Buddy | Sounds generated by the site itself, with no third-party recordings. It’s made for relaxing, not a medical device, and makes no claims to treat any sleep condition. |
How content is reviewed
Practice tests
Each question is tied to a specific section of the official guide, and that section is linked next to the explanation. Numbers such as distances, demerit points, ages and dates are checked against the current edition. Each explanation says why the right answer is right and, where it helps, why a common wrong answer is wrong. Where an official guide gives safety advice rather than a legal rule, we say so instead of presenting advice as law.
Calculators
Each calculator runs on one set of dated rules, and its methodology page walks through a worked example line by line, so you can check our result with a spreadsheet. Before each release we run test cases with known answers. When a government announces new rates, we update the rules and change the “last checked” date shown on the site.
Guides
Our guides use the same rule sets as our calculators and tests, so the numbers in an article match what the tools show. Each guide shows the date it was published and last updated.
What we don’t claim
We aren’t affiliated with the Ministry of Transportation, DriveTest, IRCC, the CRA or any other government body. Our content hasn’t been reviewed or approved by them. Unless a page names a reviewer, it hasn’t been checked by an outside professional either; if that changes, we’ll name them, and only after the review has actually happened.
Report an error
If you think something is wrong, email chowchowbuy@gmail.com or use the contact form. Tell us the page or question number and, if you can, link to the official source. We check every report against the source and fix confirmed errors. The G1 site keeps a public log of corrections, and our other sites note changes on their methodology pages.