<p>No. There is only one, but there are district, regional and state competitions before one can get to the national level. A topic is issued every year. It should be available by now. The NHD site has all the information. It is quite an achievement to make it to state or national level. Even if one does not, the competition provides great opportunities to learn how to do research and write essays or put together projects (videos, performances, display boards, etc…) Talk to your Social Studies teacher if you are interested in participating.</p>