In my area, we are considered community health nurses, because we are the liaison between the school and community, and we also assist our families in finding local resources for things like eyeglasses, dental, and medical care. Our district has a great relationship with the local community health clinic, and they provide vaccine resources, as well as come to different events that the schools host, and provide literature to our families.
Since I am in a high school, our students have a health class that they take, so I don't do any kind of teaching. I have a bulletin board in the cafeteria where I provide health education, and I work with our counselors and Communities in Schools representative to ensure that students have what they need.
I am in a low SES suburban area, and primarily encounter headaches and stomachaches, but do have students with serious conditions, like asthma, severe allergies, seizures, and diabetes.
I think the students appreciate when you talk to them like they are real people, and listen to their concerns. Ask them what questions they have, and make them feel comfortable coming to you.