https://www.heraldargus.com/news/learn-how-origami-influences-technology/article_d88d8e1c-770d-557e-a456-61393df35337.html

VALPARAISO — Origami, the ancient art of Japanese paper folding, once was considered mostly child’s play – a flapping bird, a fortune teller, a ninja star, said Leslie Cefali, who has taught at Purdue University in Westville.

Teachers may have used it briefly in math class or perhaps had the class fold the traditional crane during a social studies lesson.