It is your responsibility to learn the material. It is my responsibility to make the learning process as productive as possible. If you miss a class, check the course outline to determine what work you must do, read the material in the text, do the homework, phone if you need help. For many students, this is a review course. Don't think that means it's easy.
Homework is important.
Stay with it. Don't miss a test. If you must miss a test, be sure I know about it as soon as you do. It is work. Plan time to attend class as well as time to work on the material outside class.