To reorder lessons:

1. Navigate to the course.

2. Drag and drop the lessons to reorder them.
   

To reorder a chapter along with lessons:

1. Navigate to the course.

2. Drag and drop chapters to reorder the chapter along with its lessons.

To delete a lesson:

1. Navigate to the course, then go to the Lessons tab.
   
2. Click the More Options icon () on the lesson. 
   
3. Click Delete.
   

To delete a chapter:

1. Navigate to the course, then go to the Lessons tab.
   
2. Click the More Options icon () on the chapter.
   
3. Click Delete.
   

To delete a course:

1. Navigate to the course, then click the More options icon () in the top-right corner.
   
2. Click Delete Course.