Nonverbal Communication in the Classroom

The Chalk Blog

https://www.learnersedge.com/blog/nonverbal-communication-in-the-classroom

Nonverbal signals: An evidence-based behavior strategy

By Amanda Morin

https://www.understood.org/articles/en/behavior-strategy-nonverbal-signals

Paralanguage: Definition & Examples

https://study.com/academy/lesson/paralanguage-definition-examples.html