- It helped broaden my students' view of the world.
- It was interactive and fostered communication and community.
- It told a very hopeful story, which is nice to hear in this age of uncertainty.
- It generated a great conversation about how to display data in an interesting, informative and visual way. There are a lot of tools that help with this. This image of Napoleon's retreat is probably the most famous data visualization of which I know.
If you are looking for a rock-solid, one-off lesson or a solid supplement to a broader lesson, I strongly recommend this lesson from Gapminder.