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Abstract Algebra: Theory and Applications by Judson (GFDL) [Review]
Advanced Algebra II: Conceptual Explanations by Felder (CC-BY) [Accessibility] 
Advanced Algebra II: Activities and Homework by Felder (CC-BY) 
Algebra by Boundless (CC-BY-SA)
bullet-3 Algebra and Trigonometry by Abramson, et al. (CC-BY) BoundCopy
Algebra is Vital by Buck (CC-BY-NC-SA)
Algebra Review by GeoGebra (CC-BY-NC)
Analysis by Khalagai (CC-BY-SA)
bullet-3 APEX Calculus by Hartman, Heinold, Siemers, Chalishajar, and Bower (ed.) (CC-BY-NC) 
Applied Discrete Structures by Doerr and Levasseur (CC-BY-NC-SA)
Applied Finite Mathematics by Sekhon (CC-BY) [Review]
Basic Algebra by Wikibooks (CC-BY-SA)
Basic Analysis: Introduction to Real Analysis by Lebl (CC-BY-NC-SA) 
bullet-3 Basic Arithmetic Student Handbook by Dept. of Mathematics, Scottsdale Community College (CC-BY-SA)
Basic Math Textbook for the Community College by Brown (CC-BY)
Basic Mathematics by Khalagai (CC-BY-SA)
Basics of Algebra and Analysis for Computer Science by Gallier (custom license)
bullet-3 Book of Proofs by Book of Proofs (CC-BY-SA)
Brief Calculus by Crowell (CC-BY-SA)
Calculus by Strang (CC-BY-NC-SA) [Accessibility]
Calculus by Masenge (CC-BY-SA)
Calculus by Guichard (CC-BY-NC-SA) 
bullet-3 Calculus by Strang and Herman (CC-BY-NC-SA)
bullet-3 Calculus: Early Transcendentals by Lyryx Learning (CC-BY-NC-SA) Ancillaries
bullet-3 CK-12 Algebra I by Rawley, Gloag, and Gloag (CC-BY-SA)
CK-12 Single Variable Calculus by Almukkahal, Cifarelli, Fan, and Jarvis (CC-BY-NC-SA)
CK-12 Geometry by Cifarelli, Gloag, Greenberg, Sconyers, and Zahner (CC-BY-NC-SA)
CK-12 Trigonometry by Landers and Meery (CC-BY-NC-SA)
bullet-3 College Algebra by Abramson, et al. (CC-BY) BoundCopy
College Algebra  by Stitz and Zeager (CC-BY-NC-SA) [Accessibility]
bullet-3 College Trigonometry by Stitz and Zeager (CC-BY-NC-SA) 
bullet-3 A Computational Introduction to Number Theory and Algebra by Shoup (CC-BY-ND-NC) 
Diagrams, Charts and Graphs by OpenLearn (CC-BY-NC-SA)
Difference Equations to Differential Equations by Sloughter (CC-BY-NC-SA)
Differential Equations by Ekol (CC-BY-SA)
Dimensions by Alvarez, Ghys, and Leys (video) (CC-BY-NC-ND) [Review]
bullet-3 Discrete Mathematics, An Open Introduction by Levin (CC-BY-SA)
Elementary Algebra by Burzynski and Ellis (CC-BY)  [Review] [Accessibility]
Elementary Algebra by Redden (custom license
Elementary Calculus An Approach Using Infinitesimals by Keisler (CC-BY-NC-SA) [Assayer review
bullet-3 Elementary Differential Equations by Trench (CC-BY-NC-SA) AIoM Approved
  • Instructor's Solutions Manual This e-mail address is being protected from spambots. You need JavaScript enabled to view it.
  • Student Solutions Manual
bullet-3 Elementary Differential Equations with Boundary Value Problems by Trench (CC-BY-NC-SA) AIoM Approved
  • Instructor's Solutions Manual This e-mail address is being protected from spambots. You need JavaScript enabled to view it.
  • Student Solutions Manual
Elementary Linear Algebra by Kuttler (CC-BY)
The Essential Elementary & Intermediate Algebra by Blakely (CC-BY-NC-SA)
A First Course in Linear Algebra by Beezer (GFDL) [Assayer Review] [Review] [Accessibility]
bullet-3 A First Course in Linear Algebra by Kaabar (CC-BY-NC-ND)
bullet-3 A First Course in Linear Algebra by Lyryx Learning (CC-BY) Ancillaries
bullet-3 A Friendly Introduction to Differential Equations by Kaabar (CC-BY-NC-ND)
bullet-3 Fundamentals of Calculus by Crowell, Robbin, and Angenent (CC-BY-SA)
Fundamentals of Mathematics by Burzynski and Ellis (CC-BY) [Review]
bullet-3 Fundamentals of Matrix Algebra by Hartman (CC-BY-NC)
Gentle Introduction to the Arts of Mathematics by Fields (CC-BY-NC-SA)
Geometry by OpenLearn (CC-BY-NC-SA)
Geometry by Cherinda (CC-BY-SA)
Intermediate Algebra by Dept. of Mathematics, College of the Redwoods (CC-BY-NC-SA) [Review]
bullet-3g Intermediate Algebra Student Workbook by Dept. of Mathematics, Scottsdale Community College (CC-BY-SA)  [Featured]
Intermediate Algebra by Redden (custom license) 
An Introduction to Complex Numbers by OpenLearn (CC-BY-NC-SA)
bullet-3 An Introduction to MATLAB and Mathcad by Siemers (CC-BY-NC)
Introduction to Matrix Algebra by Kaw (CC-BY-NC-ND) 
Introduction To Real Analysis by Trench (Custom)
bullet-3 Introductory Algebra Student Handbook by Dept. of Mathematics, Scottsdale Community College (CC-BY-SA)
bullet-3 Introduction to Real Analysis by Trench (CC-BY-NC-SA) AIoM Approved
  • Instructor's Solutions Manual This e-mail address is being protected from spambots. You need JavaScript enabled to view it.
  • Supplement 1: Functions Defined by Improper Integrals
  • Supplement 2: The Method of Lagrange Multipliers
Linear Algebra by Hefferon (CC-BY-SA) [Assayer review] [MAA Review]
bullet-3 Linear Algebra by Cherney, Denton, and Waldron (CC-BY-NC-SA)
Linear Algebra by Chihaka (CC-BY-SA)
Linear Algebra, Theory and Applications by Kuttler (CC-BY)
Linear Programming by Mtetwa (CC-BY-SA)
Math in a Sustainable Society by Kaslik (CC-BY-NC)
Math in Society by Lippman(CC-BY-SA) [Review] [Accessibility]
Mathematics by The Free High School Science Texts (GFDL) [Accessibility]
Mechanics by Chihaka (CC-BY)
A Modern Formal Logic Primer by Teller (Custom)
Notes on Diffy Qs: Differential Equations for Engineers by Lebl (CC-BY-NC-SA)
Number Theory by Cheqe (CC-BY)
Numbers, Units, and Arithmetic by OpenLearn (CC-BY-NC-SA)
Numerical Methods by Masenge (CC-BY-SA)
Numerical Methods with Applications by Kaw, Kalu, and Nguyen (CC-BY-NC-SA) [Accessibility]
bullet-3 Prealgebra by Maracek and Anthony-Smith (CC-BY)
PreAlgebra by Reuger (Custom) [Accessibility] 
Prealgebra Textbook by College of Redwoods Mathematics (CC-BY-NC-SA) 
bullet-3 Precalculus by Abramson, et al. (CC-BY) BoundCopy
bullet-3 Precalculus by Stitz and Zeager (CC-BY-NC-SA) 
Precalculus: An Investigation of Functions  by Lippman and Rasmussen (CC-BY-SA)
Probability and Statistics by Chege (CC-BY-SA)
A Problem Text in Advanced Calculus by Erdman (CC-BY-NC-SA)
Proofs and Concepts: the fundamentals of abstract mathematics by Morris (CC-BY-NC-SA)
Ratios, Proportion and Percentages by OpenLearn (CC-BY-NC-SA)
Real Functions and Graphs by OpenLearn (CC-BY-NC-SA)
Reasonable Algebraic Functions  by Schremmer (GFDL
Reasonable Basic Algebra by Schremmer (GFDL) 
Reasonable Decimal Arithmetic by Schremmer (GFDL)
Rounding and Estimation by OpenLearn (CC-BY-NC-SA)
Squares, Roots and Powers by OpenLearn (CC-BY-NC-SA)
bullet-3 Tea Time Numerical Analysis by Brin (CC-BY-SA)
Trigonometry by Corral (GFDL
Trigonometry by Wikibooks (CC-BY-SA) [Accessibility]
Understanding Algebra by Brennan (CC-BY-NC) [Review] [Accessibility] 
Vector Calculus by Corral (GFDL) [Review]  [Accessibility]
Worldwide Differential Calculus by Massey (ACARR) 
bullet-3 wxMaxima for Calculus I by Hannan (CC-BY-NC-SA)
bullet-3 wxMaxima for Calbulus II by Hannan (CC-BY-NC-SA)


Disclaimer: College Open Textbooks has not yet vetted all of the open textbooks on this list for quality or accuracy of the content. Peer reviews, if avaible, can be found through the [Reviews] link. Accessibility reviews, if available, can be found through the [Accessibility] link.
License Attributes: ACARR=Affordable Copyright All Rights Reserved.  BY=Open w/ Attribution.  CC=Creative Commons license.  GFDL=GNU Free Documentation License.  GGPL=GNU General Public License.  NC=Non-Commercial.  ND=No Derivative Works.  PD=Public Domain.  SA=Share Alike. 
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