There are four major themes:
1. Latitude and longitude: You don't need to buy a globe anymore, the earth is directly in the hands of students, how to turn and how to observe is very simple!
2. Longitude and time zone: do not understand why there is a time difference? Do it yourself, turn around and count the time zones, you can understand!
3. Day and night and the four seasons: rotation and revolution are dumb and unclear? Jump out directly from the textbook and show it to you, and immediately understand the day and night and the four seasons.
4. Five major terrains: Students understand the relationship between terrain profile maps, contour terrain maps and three-dimensional terrain maps in seconds.