Unless your state requires it, you don't have to teach Health every year of high school. Some states want Health to be a requirement for graduation, but colleges generally don't care about it much. Some colleges want to see students who take health as a separate course, while others assume it is included in Physical Education (PE) classes. More often, colleges don't mention it as a requirement at all.
In Washington State, we are required to teach Health at some point during K-12, but it isn't specified which year, or how much health is necessary. I included some health studies along with PE in Middle School, and again in High School. We really liked the books by Susan Boe. Written for Christian Schools, it's assumes the student lives in a reasonably healthy environment, without sex or drugs. It covers physical, spiritual, and social health.
The Junior High or Middle School Book: Total Health: Talking About Life's Changes by Susan Boe
For younger students, we used "Passport to Purity" for a discussion about healthy dating. Again, this is from a Christian perspective.
Passport2purity [BOX SET] (Paperback)
by Dennis Rainey (Author), Barbara Rainey (Author)
Make the most of your college visit. Check out my Finding a College DVD.