Login at the eCollege course website, click on the Unit, then click on the quiz to find instructions and how to start the quiz. The subject of the Unit does not correspond to the quiz so don't pay attention to that. The quizzes are scheduled for each of the 15 weeks of the course and they are located in Units 1-15.
Quizzes are available until the scheduled deadlines.
Online students will not receive credit for quizzes taken in the on-campus class.