The best way to get to a class you are teaching is through the Instructor Calendar. You can access a Class anytime once you've been set up as the instructor. From the calendar you can always see the name and start time of the class.
Opening up the class will let you see these times as well as things like:
Class location
Registered students
Classroom
If the class will run in a virtual classroom
You can also run labs associated with the class from the Class page.
To access a class:
Select My Calendar at the top of any window.
This will open up your Instructor Calendar. Select the name of the class to open up the Class page.