“Be True to Your School” Exhibit Opening. What do you remember about high school? The Friday night lights? How you made your best friend? Join us for the grand opening of a new exhibit about Grayslake’s two High Schools on Saturday, August 27 at 12:00 PM. See the evolution of the buildings, academics, sports, clubs, and events over 75 years of history at “Be True to Your School: 75 Years of Grayslake High Schools.” The first 30 visitors get a Rams or Knights school magnet.