Based on your search query, I would recommend using GeoGebra for your geography unit.

GeoGebra is a dynamic mathematics software suite that can be effectively used for teaching geography. It provides a 2D and 3D interactive geometry environment, which can be used to demonstrate geographical concepts and phenomena. For example, you can create interactive maps or diagrams to explain geographical features or climatic zones.

The GeoGebra Materials platform is another useful feature. It's a cloud service that allows you to upload and share GeoGebra applets with your students. These applets can include interactive worksheets, simulations, games, and e-books, which can be used to supplement your geography lessons.

Moreover, GeoGebra is free for non-commercial use by students and teachers, making it a cost-effective solution for your needs.