The main resourse for Math 31 is the textbook: Stewart, James et al., Calculus: A First Course, McGraw-Hill Ryerson Ltd., 1989. This excellent textbook will be consulted regularly and used for exercises.
There are, in addition, a number of excellent websites in which the concepts of calculus are developed with interactive pages listed below. These pages may be consulted during the course.
See for example these visual calculus notes by Lawrence S. Husch, Professor of Mathematics at the University of Tennessee, or