Mar 24, 2012. Join Dr. Jennifer Switkes in her College Calculus 1 online course where she covers all the important topics with clear explanations, tons of. Online homework and grading tools for instructors and students that reinforce student learning through practice and instant feedback. Calculus. This is the free digital calculus text by David R. Guichard and others. It was submitted to the Free Digital Textbook Initiative in California and…