Incorporating literacy is always a good strategy. Books about community helpers like firefighters, policemen, mailmen, and the like teach students about what those folks do. Field trips to the fire station or the library provide the real-world application, and many of them will come to you if field trips aren't a reality. For an activity, you could provide items that each of your community helpers may use and have students sort them. They could be real objects or pictures of the objects. You could easily tell what students have and have not learned by the way they complete the activity.

Introduce a lesson on keeping our community clean by reviewing what students do in the classroom to keep their school community clean and safe. Then encourage the children to brainstorm on what they can do in their neighborhood communities to help keep our earth and environment clean - record responses on the whiteboard or chart. Then the class as a whole group can create a mural that visually represents their ideas.

The teacher could read books about community helpers or she could have different helpers come into the classroom to talk with the students. She could explain what they do and have students role play the community helpers. I know in many Pre-K classrooms they have clothing that students use to play dress up during center time.

I would say be enthusiastic, if you are excited they will be interested. You could also take them the the schools library or have a police officer or firefighter come in and talk to them about what they do.

Expose the children to simple maps of their county/neighborhood and assist them in adding locations to the map to gain relevance (i.e. their home, school, grocery store, library, etc.).

You could have the students make a large map of the school with 3D buildings and items to place on the map.