"A picture is worth 1000 words." When we learn new ideas, a graphic organizer can be an excellent teaching aide.
Why do they work? Random facts are quickly lost. However, the brain's ability to store pictures is unlimited. And since the brain likes small pieces of information, the graphic organizer helps the brain.
When do they work? Graphic organizers are useful whenever we are given new information. They can be used to organize or to brainstorm.
How do they work? These are simple, and we can add details. The brain remembers more when we are creative.