Students cheer as four-time Emmy-award winning actor Jim Parsons is introduced as the keynote speaker during Muir United day at Muir Middle School in Burbank on Thursday, Nov. 16, 2017. Parsons, who plays Sheldon on The Big Bang Theory, gave his message of understanding and empowerment to the entire 1,500 students and staff during a school day devoted to acceptance, tolerance and unity. (Raul Roa / Staff Photographer)
Four-time Emmy-award winning actor Jim Parsons gives his keynote address about acceptance and tolerance during Muir United day at Muir Middle School in Burbank on Thursday, Nov. 16, 2017. Parsons, who plays Sheldon on The Big Bang Theory, gave his message of understanding and empowerment to the entire 1,500 students and staff during a school day devoted to acceptance, tolerance and unity. (Raul Roa / Staff Photographer)
Four-time Emmy-award winning actor Jim Parsons gives his keynote address about acceptance and tolerance during Muir United day at Muir Middle School in Burbank on Thursday, Nov. 16, 2017. Parsons, who plays Sheldon on The Big Bang Theory, gave his message of understanding and empowerment to the entire 1,500 students and staff during a school day devoted to acceptance, tolerance and unity. (Raul Roa / Staff Photographer)
Four-time Emmy-award winning actor Jim Parsons gives his keynote address about acceptance and tolerance during Muir United day at Muir Middle School in Burbank on Thursday, Nov. 16, 2017. Parsons, who plays Sheldon on The Big Bang Theory, gave his message of understanding and empowerment to the entire 1,500 students and staff during a school day devoted to acceptance, tolerance and unity. (Raul Roa / Staff Photographer)
The Gay Men’s Chorus L.A. performs for students during Muir United day at Muir Middle School in Burbank on Thursday, Nov. 16, 2017. (Raul Roa / Staff Photographer)
Muslim Women Speakers Movement founder Soraya Deen about promoting peace during Muir United day at Muir Middle School in Burbank on Thursday, Nov. 16, 2017. (Raul Roa / Staff Photographer)
Four-time Emmy-award winning actor Jim Parsons gives his keynote address about acceptance and tolerance during Muir United day at Muir Middle School in Burbank on Thursday, Nov. 16, 2017. Parsons, who plays Sheldon on The Big Bang Theory, gave his message of understanding and empowerment to the entire 1,500 students and staff during a school day devoted to acceptance, tolerance and unity. (Raul Roa / Staff Photographer)
Four-time Emmy-award winning actor Jim Parsons poses for a photo after giving his keynote address about acceptance and tolerance during Muir United day at Muir Middle School in Burbank on Thursday, Nov. 16, 2017. Parsons, who plays Sheldon on The Big Bang Theory, gave his message of understanding and empowerment to the entire 1,500 students and staff during a school day devoted to acceptance, tolerance and unity. (Raul Roa / Staff Photographer)
A mock tombstone for unkind words was set up during Muir United day at Muir Middle School in Burbank on Thursday, Nov. 16, 2017. (Raul Roa / Staff Photographer)
Four-time Emmy-award winning actor Jim Parsons poses for a photo next to a We Are Unite4d poster after giving his keynote address about acceptance and tolerance during Muir United day at Muir Middle School in Burbank on Thursday, Nov. 16, 2017. Parsons, who plays Sheldon on The Big Bang Theory, gave his message of understanding and empowerment to the entire 1,500 students and staff during a school day devoted to acceptance, tolerance and unity. (Raul Roa / Staff Photographer)