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

Tests will be graded and returned within two weeks.  You will see the grade in the Grades tab.

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

Group projects could take up to 2 weeks to grade.  After grading, the instructor will post grades under the "grades" tab.