Here are some textbooks and individual units that I use in my courses. Instructors at other colleges and universities are free to use them with attribution. Simply send me an e-mail giving me your name, institution, department, course, and what you plan to use. THANKS, and enjoy!
Mathematical Structures and Proof
by H. Joseph Straight and Julia M. Wilson
This is a text used at SUNY Fredonia for our MATH 210 course. Individual chapters are available in pdf format.
Linear Algebra: An Invitation
by H. Joseph Straight
This is the text that I use at SUNY Fredonia for our MATH 231 course. Individual chapters are available in pdf format.
Maple Examples
These are some Maple examples that I use in our MATH 125 Software for Mathematics course.
Smokin' Joe's Catalog of Groups
A catalog of all the groups up to order 31.