Imagine all your students having access to the course textbook on the first day of class, and that they will have perpetual access to the textbook and all future editions. Make it a reality and try out a free textbook with a paperback option!

Register and become a verified teacher. When you are verified, you get access to instructor-only options, like solutions to even-numbered solutions.

Let us know how we're doing. What new products do you want to see? What existing products do you want to see grow?

Our team uses Dropbox to back up and share files. Sign up for this free service with this referal link to give a little extra storage space to an OpenIntro staff member and add an extra 500MB to your free account.

Thank your teacher for her hard work, and give your teacher an extra thank you if she is using a free resource!

Register to help us build a body of students who share a desire to make education materials more accessible and affordable.

Share resources that you find helpful with your fellow students, or contact us if there's a new resource you would like to see.

Have a statistics question? Post it in the public forums.

Our team uses Dropbox to back up and share files. Sign up for this free service with this referal link to give a little extra storage space to an OpenIntro staff member and add an extra 500MB to your free account.