The work was based on an extension course given at Reed College.

Also offered are a wide variety of extension courses.

Think of this as an extension course that will deal with a few things I have learned about Klingons.

In its first nine years of operation, the College offered extension courses for active teachers during the summer.

He urged that the extension courses be upgraded to a degree program.

He took extension courses, taught school, worked as a traveling salesman and wrote short stories.

Actually, I had reason to take an extension course a few years ago.

He had growing concerns over the fact that the extension courses, started in 1873, were aimed at the upper and middle classes.

He continued his education through night school and extension courses.

Harmon also took extension courses in law and tool engineering.