I am in an organization that has 13 separate units. Different units have different teachers and lessons starting in different months throughout the summer but all member in all units need to pass the same certification test. The certification test needs to be available for different dates for the different classes (members of one unit should not see the certification test until the testing date for their unit. I created separate classes for each unit. I have been able to create separate classes and add the course with the certification test to each class separately. When I go to the URL for the each class it correctly shows a course in that class. But when I change availability date for the course in one class it changes the availability dates for the course the other class. Also when I log in as a user I can not access the URL for the class, it displays "Access denied. You are not authorized to access this page." I would like for a users to be able to see courses in their class.