Our Philosophy

• Learning Calculus requires working problems, pencil in your hand. You can't learn how to solve problems successfully by merely watching others, just as you can't learn tennis by watching others play on TV.
• You can succeed, whatever your current level—beginner or advanced. Learning requires the opportunity to work at your learning edge, where being able to solve a given problem is just beyond your current reach. We'll help you build from wherever you are.
• You’re in charge of your own learning. We provide the resources and tools. You choose what to do when. We’ll never force you into a tutorial, or to get a certain number of problems right before you can proceed.
• Learning requires making mistakes, without penalty. So make your mistakes here, rather than on your graded homework or, even riskier, on your exams.
• You need to practice solving problems the same way you will during an exam, using a pencil and paper, and maybe a calculator. You won’t spend time on an exam entering complicated mathematical expressions into an automated system for grading, so we won’t make you spend time on that either.
• The opportunity to learn well should be available to everyone, regardless of financial status, and with privacy protected. Our materials are free to the world, and we will never sell anyone's data. We do not display ads so you can focus without distraction. We rely on our community's voluntary financial support to maintain this site and to continue content development.
• Learning requires interacting with others in a supportive environment. Our easy-to-use forum is open to those who would like to join the discussions and get helpful answers to their questions.