Exploratorium: Mathematics
"Discover mathematics through websites, videos, and hands-on activities on the Exploratorium website."
Khan Academy
Choose resources for algebra, geometry, trigonometry, statistics, calculus, and more.
MIT OpenCourseWare: Mathematics
Undergraduate and graduate course materials
Open Course Library: Math
The Open Course Library (OCL) is a collection of shareable course materials, including syllabi, course activities, readings, and assessments designed by teams of college faculty, instructional designers, librarians, and other experts. Some of our materials (also called open educational resources, or OER) are paired with low cost textbooks ($30 or less). Many of the courses can be taught at no cost to students.
OpenOregon Educational Resources
List of math resources used in Oregon's community colleges
OpenStax: Math
Includes Pre-Algebra, Algebra, Geometry, Pre-Calculus, Calculus I-III, Trigonometry, Statistics
PhET: Math
Interactive simulations in math from the University of Colorado at Boulder
Statistics Textbooks
3 different textbooks for community college level.
Stitz Zeager Open Source Mathematics
Precalculus, 3rd Corrected Edition free eBook (.pdf)
College Algebra 3rd Corrected Edition, (Chapters 1-9 of Precalculus) free eBook (.pdf)
College Trigonometry 3rd Corrected Edition, (Chapters 10-11 of Precalculus) free eBook (.pdf)
YouTube: Math Videos: cstitz42 Channel
Carl Stitz is co-chair of Lakeland CC Mathematics Department.
Videos for College Algebra / Pre-Calculus, Calculus/Analytic Geometry, and Multivariate Calculus
https://www.youtube.com/user/cstitz42