an instructional tool in which brief written text is presented prior to other text for the purpose of enhancing the comprehension of that text.

a special form of introduction designed to place subsequent detailed learning into perspective

any information, such as an introduction, that tells readers what they’re about to read.

Concepts given to students prior to a course or session to provide a stable cognitive structure in which the new learning can be subsumed (after Ausubel).

Content that is presented prior to learning and that can be used by students to organize and clarify new incoming information. The purpose is to build a bridge from prior knowledge to the new information that encourages the understanding, learning, and retention of the new concept. ( learn more)