Links

www.soinc.org       National Science Olympiad        - the place to go for event descriptions and rules, as well as useful information for event preparation. 

https://ohso.osu.edu/         Science Olympiad State Final at The Ohio State University        -  information about the State Tournament, upcoming and previous. 

https://scioly.org/             The Science Olympiad forums and Wiki        -  lots of information and even old tests for some of the events.