"Eighty percent of success is showing up." (Woody Allen)
You probably don't want to hear this, but your class attendance is vital for both you and your classmates. Most professors want to hear your opinions, and actively encourage class discussion - discussion that is hampered when people don't show up.
We all know people who never attended class once and yet still got an A. These people are a rare example of self-motivated learners who spend time studying on their own. It is not recommended that you follow this example, and studies have shown that there is a distinct correlation between higher grades and higher class attendance.
You should also be aware that some professors here at UAB will include attendance and class participation in your final grade. Lack of either will leave you with a lower grade, even if you turned in every piece of homework and every test.