As mentioned in Communication Rules - the instructor will reply in most cases from email questions within 24 hours.  Weekends may take longer to respond.

Quizzes are automatically graded - so you will see your grades immediately.  

Discussions are normally graded within a week.  Grades will be posted under the "Grades" tab.

Both individual and team projects could take up to 2 weeks to grade - final team project will be graded within a week.  After grading, the instructor will post grades under the "grades" tab.