Music in World Cultures

Music on the Move

My Math GPS: Elementary Algebra Guided Problem Solving (2016 Edition)

My Next Move

MyOpenMath

Mythology Unbound: An Online Textbook for Classical Mythology

No Limits, Chapter 8.2: Career and Major Exploration as a Process

Notes from Trigonometry

OER Math 1060 – Trigonometry Pilot Edition

Online Statistics Education: An Interactive Multimedia Course of Study

Open access books on JSTOR

OpenStax American Government Audiobook

Oregon Writes

Precalculus 2e (contain chapters on Trig) Openstax

Prepare, Practice and Perform: Public Speaking for the 21st Century

Principles of Biology -- An Introduction to Biological Concepts

Principles of Economics

Principles of Economics: Macroeconomics(MRU)

Principles of Macroeconomics

Principles of Macroeconomics (LibreTexts)

Principles of Macroeconomics (Skills Commons)

Principles of Macroeconomics - 3e

Principles of Macroeconomics(Georgia Tech)

Principles of Microeconomics (adaptation of OpenStax textbook)