From the event website:
"The Stanford Pre-Collegiate Science Conference aims to empower and engage all students captivated by the wonders of Science, Technology, Engineering, and Mathematics.
The Science Conference 2015 features ongoing research from Stanford scholars and the Bay Area science community as well as the fascinating scientific work being conducted by young scholars across the country. Students experience hands-on activities, presentations, roundtable discussions, professional and student panels, and more!
Who: Current High School Students in Fall 2015: Grades 9-12"
For more information, see the event website.