Assigning a course to multiple classes
From your courses page, select the option to manage your school's courses.
From there, you can see all the active and draft courses for your school. For any active course, you can use the actions dropdown menu to assign the course to classes.
Assigning multiple courses to a single class
You can also assign courses to your classes directly from the class page. From the menu on the top right, navigate to the Classes page.
This page is sorted to 'My Classes' by default. Change the dropdown if you want to see all the classes at your school.
Select 'Open class' on the class you want to assign a course to.
Underneath where it says 'Courses' on the class page, it will show any assigned courses for the class.
Click on the edit button next to Courses and a menu will appear that will allow you to select from any of your school's active courses.