By default a regular teacher can’t add a new course. To add a new course to Moodle, you need to have either Administrator, Course Creator or Manager rights.
To add a course:
From the Site administration link, click Courses>Manage courses and categories
Click New course in the category page on the right Click on the category where you want your course to be.
Click the “New course” link
Enter the course settings, and then choose either to “Save and return” to go back to your course, or “Save and display” to go to the next screen.
On the next screen,if you have chosen “Save and display”, choose your students/teachers to assign to the course.
To delete a course (as an admin or manager):
Course code of the course
semester start date
semester end date
Course code of the referring course.
Should be enable. select ‘Yes’