To create levels in the school we must access to:

Planning -> Sport school -> Courses / Schools.

Here we will see a list of schools or courses that we have created. 

Click the icon In the school in which we want to create levels:

Once we have entered, we will go to Levels section:

Here we will see the list of levels that we have created. If you have not created any, the list will be empty.

To create new levels click the icon "New", to edit them pressand to remove them.

When we create new levels we will see a window like the following when we subscribe some customer to the school: