Clear sources.
Original explanations.
Our videos explain one skill at a time, using original teaching examples. These references help us check the facts. Referencing a publisher does not mean it endorses FinishHigh.
References checked October 29, 2026, and October 30, 2026. A checked date describes our review, not the source’s publication date.
Test format and calculator
GED Testing Service
- Test subject outline ↗
- Official preview and calculator tutorial ↗
- Calculator reference guide (2015) ↗
- Published assessment indicator reference ↗
Used to check the subject outline, calculator references, extended-response time, and topic mapping. Confirm current rules for your location with GED.com.
Math, geometry and data
OpenStax / Rice University
- Percent applications — Prealgebra 2e ↗
- Right triangles and the Pythagorean theorem — Prealgebra 2e ↗
- Averages and probability — Prealgebra 2e ↗
The worked examples, number lines, tables and questions in our videos are original. We link to the textbook rather than reproduce its pages or exercises.
Experiments and simple inheritance
OpenStax / Rice University
The plant experiment is illustrative. A simple dominant/recessive model does not describe every real trait. Probabilities do not guarantee a particular family of outcomes.
Reading, arguments and economics
OpenStax / Rice University
Our library survey and passages are fictional teaching examples. Economic diagrams are simplified models with stated conditions, not a forecast.
Government and historical sources
US National Archives
- What the Constitution says ↗
- Presidential veto and congressional override ↗
- Analyze a written document ↗
The factory-owner letter is an original fictional scenario, not a quotation from an archive. Author, date, purpose, audience and supporting evidence matter when interpreting a source.
Voice and moving graphics
The replacement lessons use Qwen3-TTS’s built-in Sohee voice speaking English. This is AI narration, not a recording of a human teacher. The original graphics show the worked steps; you can pause, change playback speed, read captions, or use a transcript.
Real-footage credits
Short edited context shots are used under the Pexels license. The people shown are not presented as FinishHigh students or endorsers. These shots are study or shopping context, not recordings of our worked examples.
- Person writing in a notebook — Pavel Danilyuk (March 27, 2020)
- Writing in a notebook — SHVETS production (March 19, 2021)
- Produce at a market stall — Los Muertos Crew (October 26, 2021)
Independent GED® test-style practice. No pass guarantee. Read our content process ↗