The spiral approach is a technique often used in education where the initial focus of instruction is the basic facts of a subject, with further details being introduced as learning progresses.
Throughout instruction, both the initial basic facts and the relationships to later details are repeatedly emphasized to help enter into long-term memory.
[2] This principle is somewhat similar to the inverted pyramid method used in writing news stories, and the game 20 questions[citation needed].
Jerome Bruner proposed the spiral curriculum as a teaching approach in which each subject or skill area is revisited at intervals, at a more sophisticated level each time.
Bruner's spiral curriculum, however, draws heavily from evolution to explain how to learn better, and thus it drew criticism from conservatives.