Free Online Textbooks for College level and AP classes

OpenStax is a nonprofit educational initiative based at Rice University, and its mission is to give every student the tools they need to be successful in the classroom.  In short, it's free online textbooks for the college and AP level.  Many colleges have already started using these resources as a way to help students save money.  Now high schools have starting catching on and have begun using them as well.  You may be familiar with CK12 for high school level textbooks; this is just the next step up. 

OpenStax gives instructor resources such as PowerPoint slides, solution manual, sample syllabus, and assessment banks.  In addition, it also offers connections to various technology resources.  There are a few options to read these books.  You can read them online, download them as a PDF or even send them to your Kindle.  They also offer an option to order print copies from Amazon or buy them in bulk if you want.

Topics include:

Math

• Prealgebra
• Algebra (Elementary, Intermediate and College)
• Trigonometry
• Precalculus
• Calculus
• Statistics

Science

• Anatomy and Physiology
• Astronomy
• Biology
• Concepts of Biology
• Microbiology
• Chemistry
• Physics

Social studies

• American Government
• Economics (principles, macro and micro)
• Psychology
• Sociology
• US History

Buisness

• Intro to Business
• Business Ethics
• Principles of Accounting

AP

• Biology
• College Physics
• Principles of Macroeconomics
• Principles for Microeconomics