References

Every course here is written against a named anchor text — one standard work whose terminology and topic boundaries the course follows — and checked against a secondary witness written independently of it. Where the two disagree, the course follows the anchor and says so at the entry where the disagreement lands. These are the texts for ACT Preparation.

Anchor (English)

OpenStax, Writing Guide with Handbook. Pinned to the edition archived June 4, 2026.

CC BY 4.0

Anchor (Mathematics)

OpenStax, Algebra and Trigonometry 2e, Prealgebra 2e and Introductory Statistics 2e; Henry Africk, Elementary College Geometry (CUNY Academic Works, 2021).

CC BY 4.0; geometry CC BY-NC-SA

Anchor (Reading)

Babin, Burnell, Pesznecker, Rosevear and Wood, The Word on College Reading and Writing (Open Oregon Educational Resources).

CC BY-NC 4.0

Anchor (Science)

OpenStax, Introductory Statistics 2e, Biology 2e, Chemistry 2e, College Physics 2e and Astronomy 2e; Earle, Physical Geology.

CC BY 4.0

Secondary witnesses

Writing for Success (Saylor edition); Stitz and Zeager, Precalculus; Diez, Çetinkaya-Rundel and Barr, OpenIntro Statistics; Petrunin, Euclidean Plane and Its Relatives; Campbell, Noteworthy: Reading Strategies in Practice.

Open licences, as stated in each book

Test structure

ACT, Preparing for the ACT 2025–2026, used for section structure and timing only. No ACT question or passage is reproduced, and StudyWalks is not affiliated with ACT, Inc.

Naming the anchor is not a claim of endorsement by its publisher, and the course is not affiliated with any of the works above. Openly licensed texts carry their licence beside them; the rest are cited, not reproduced.