Non-religious private schools (K-8) started by Barbara Baker which began as a preschool sometime in the early '80s. There are branches in Utah, Nevada, and Northern California. The curriculum is hard (ie. Geometry is mandatory for all 8th graders and kindergarteners are required to learn the times table) with a practically nonexistant sports or music program.

Also a breeding ground for fobs or wanna-be gangster Indians and Viets or little I love Hilary Duff "OMG I'm so punk rawk" poseurs.
I went to Challenger, Berryessa. It sucks big balls.
by WHATTHEFCUK June 19, 2005
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A (gay) conservative private elementary/middle school for try-hard Asian kids and the occasional white kid. Their students have been scientifically proven to have microscopic penises, as shown by their lack of ability to even talk to girls. They have no school spirit and have an average height of 4’6”, which they pride theirselves on (and the one kid who’s 4’9” will never stop flexing his height). From a retarded Challenger student, trust me, you don’t want to send your kid to this school (even Stratford is better...oh wait, never mind).
Your kid goes to Challenger School? Can’t wait to bully the crap outta him!
by gayanis_antetokounmpo April 5, 2019
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Paintball event dedicated to "old school" style pump play. Largest international event for the pump arena currently. The series is run largely in North America with external competition events placed all over the world.
My team paintball pump plays in the Old School Challenge Series.
by OSCpumper4Life January 11, 2010
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