My Final Grade is WHAT!??!

This coming week has been one I have been dreading. After weeks of relaxing and taking a "laisse faire" approach to school, it has finally caught up with me. Most of my classes have decided to bombard the next two weeks with assignments, projects, and tests that cease to exist during the first part of the semester. As the assignments begin to pile, I begin to realize that this one assignment, project or test will practically determine my grade in the class. I have never had a class before where a single task counts as much as ninety percent of the grade in the course. Naturally, I'm terrified. This system is very different from the American grading system I am used to. I'm used to having attendance not only count as part of my grade but also as extra credit in some classes. Daily assignments and quizzes cushion the majority of the test grades and tests are given every eight weeks or six weeks or so. Ecole de management only has one task that determines your FINAL grade. Different and difficult needless to say.