Difference between Propaedeutics and Propaedeutic

What is the difference between Propaedeutics and Propaedeutic?

Propaedeutics as a noun is an introductory course of instruction. while Propaedeutic as a noun is such a course of instruction

Part of speech: noun

Definition: An introductory course of instruction.

Part of speech: noun

Definition: such a course of instruction

Part of speech: adjective

Definition: providing preparatory or introductory teaching

We hope you now know whether to use Propaedeutics or Propaedeutic in your sentence.