Companion spaced-repetition flashcards collection linked to the essential concepts in this OpenStax book.


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Barbara Oakley, Ph.D.

Creator of Coursera's
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Algebra and Trigonometry 2e

Valeree Falduto, Ed.D.
Group creator and maintainer:
Valeree Falduto, Ed.D.
Adjunct Instructor, Mathematics
Palm Beach State College

Master hundreds of key concepts from this textbook for free in a fraction of the time with support from Dr. Falduto and fellow students

This group contains content from Algebra  and Trigonometry 2e by OpenStax.  Included are scores of spaced-repetition flashcards, organized by chapter, linked to specific relevant locations in the textbook. We call these unique flashcards "Recalls."

We recommend that you read this fantastic free book to learn algebra and trigonometry then use iDoRecall's flashcards to remember what you've learned. When you practice memory retrieval, if you struggle to recall the answer, click the source link and the textbook will open at the precise relevant location so that you can refresh your memory in the context where you learned it. We invite you to join our dedicated Algebra and Trigonometry Facebook group.

Create a free iDoRecall account and start using these materials today.

This book is licensed by OpenStax under the Creative Commons CC-BY 4.0 license. Access the book for free at: