National Geographic has a list of Classroom Activities that are divided by grade level. Note that this is not a complete list of all resources available - be sure to check out the full collection of National Geographic's Teaching Resources.
Grades K-2 -- Places in the Park (Why do we use symbols?), Characteristics of Place (What are the characteristics of places?), and Exploring the Characteristics of Places (What information about place is most important?)
Grades 3-5 -- Identifying Species (How can physical characteristics help you identify species?), Introducting Biodiversity and BioBlitz (Why is biodiversity important? How can a bioblitz help us learn about local biodiversity?), Designing a BioBlitz Learning Experience (How can park leadership help prepare scientists, naturalists, and other expert volunteers to work with students and other participants during a BioBlitz? What equipment and setup are needed?)
Grades 6-12 -- Conduct a Micro-Expedition (What final preparations are needed for carrying out a micro-expedition and communicating the outcome?), Plan and Prepare for an Expedition (What steps are needed to prepare for an expedition?), Why We Explore (What drives people to explore? What places would you like to explore?)
National Geographic has also provided a list of Quick Activity Ideas to broaden participation and your message!
The PAESTA Classroom also has activities to help students learn about space and place. Check out our collection of entries that have students specifically working with maps and spatial data, then explore the entire collection for additional activities!