The thought of learning calculus has struck fear into the heart of many students for several centuries, but this most intriguing subject need do so no longer. Developed with assistance from the National Science Foundation, the Calculus on the Web (COW) project was created by Gerardo Mendoza and Dan Reich of Temple University. As their mission statement notes, "The principal purpose of COW is to provide you, the student or interested user, with the opportunity to learn and practice problems in calculus in a friendly environment via the Internet." Certainly after considering their site, one can accurately say with gusto: Mission accomplished. The site is divided into a number of thematic modules, including those that deal with linear algebra, abstract algebra, and number theory. Along the way, users will be guided through sets of problems where they will be asked to fill in certain variables, and so on. The program will tell students about their progress, and help them if they are experiencing difficulty. Finally, the site also has a complete index which will come in handy.