Students get an e-mail notification, when they have an assignment due. You can also all check your assignments by clicking Learn and choosing Assignments on the left, where you get your Active, Upcoming, Finished and Expired listed.
You can also check Assignments within a given course by clicking Assignments when are in the menu of the course.
By clicking the name of the assignments and chossing Solve, after reading the instructions, you can start solving the assignment with the start button. In case of multiple choice questions, the system automatically corrects the answers, in case of essay questions, you have to wait for your teacher to correct them.
When you submitted your assignment, you can see your results in the Assignment menu. If the assignment can be solved multiple times, you can solve it and submit it again.