I will not allow you to miss a test because of a lack of preparation. You can check your standing in the course in a file on the Novell network. Details later at my web page. You don't even have a remote chance to pass the course without doing the homework. Not only will it enable you to test your understanding of the material you saw in class - you will understand Calculus through trying, failing, and eventually succeeding in solving the problems.
Some students struggle with picturing geometric objects in space.
MathCad will help. When you work problems, first try to do them by yourself. After that , whether you succeed or not, you may discuss them with others. You will learn from talking about mathematics. However, do not copy homework from others.