This class uses no textbook. The online videos provide the instructional content. And all assignments (homework, tests, and final exam) are completed via WebAssign. The only thing you need to purchase for this class is a WebAssign license. That must be done early in the semester. Most students make good use of some sort of calculator, and calculators are okay to take with you for tests and exams. But there is no specific calculator requirement. Your first WebAssign homework will appear on the first day of class, August 19.