Correspondence course and Course of instruction

Correspondence course noun - A course offered (by mail) by a correspondence school.

Course of instruction and correspondence course are semantically related. In some cases you can use "Course of instruction" instead a noun phrase "Correspondence course".

Course of instruction noun - Education imparted in a series of lessons or meetings.

Correspondence course and course of instruction are semantically related. Sometimes you can replace phrase "Correspondence course" with "Course of instruction", this phrases are similar.