1) The document discusses using "vignettes" in geography education to teach about the topic of migration.
2) It defines a vignette as a brief example or case study that can be used as the basis for a series of lessons on a topic, with teachers continually returning to and expanding upon the vignette.
3) It provides examples of how teachers can design lessons around analyzing different types of vignettes, such as comics, political cartoons, and photos, to develop students' geographical knowledge and thinking skills around the concept of migration.