Over at A List Apart, Shawn Medero has written a nice introduction to paper prototyping that covers the basic why and how.
"Though some people shy away from paper prototypes because they feel they will not be taken seriously, I argue that many people are intimidated by a formal, highly technical design process and that the less "professional" nature of paper prototyping is a great way to lighten the mood and engage a more diverse group. Just offer plenty of paper, pens, scissors, and other materials for anyone to grab and use. If anyone feels nervous, let them eat the paste."
- January 24, 2019 - via Usability in the News
See also: Prototyping and wireframing (120)