Before adding an exercise to a group, you must first add a content module to the group. Once a content module is added to the group, it automatically becomes an exercise.
To add an exercise to a Group, you must be on the Groups page. To access your Groups, click the Groups link  on the top of the page. Then, click the Group you would like to add an exercise to .
Select Content Module
You can now scroll or use the search bar to find the content module(s) you want to add to the group as exercises.
Select the box next to the content module name and then select the Create Exercises button. Content modules become exercises once they are added to a group. Now that the Exercise has been added to the Group, you are ready to configure the Exercise.