Yes, you can add a single or the complete recurring series of class to your course. However, you cannot add a single class of the recurring series to your course. This feature is not available currently.

There are two ways to add a class to your course:

1. Add class to your course while scheduling

While scheduling your class at Schedule a Class page, click Add more information link.  A list of all your existing courses will be displayed next to Add this class. Select the course (you can choose multiple courses) to add the class into. Your class or recurring series will be added to the selected course.

 2. Add class to your course from the class listing

You can add recurring series to your course anytime by simply going to class list. Select My Classes link from the drop down menu of My Stuff. Here you will see the list of all the classes. Find the class or recurring series to add into the course and click Add to course link besides the class title. Select the course (you can choose multiple courses) and click Add Class button. Your class or recurring series will be added to the selected courses.