My two cents in a old thread I have seen all of Klein ISD's High schools inside and out Here are my findings Klein Oak High School:---- New addition in 2010, very dated inside, and poorly maintained Outside it has the nicest campus of the 4 schools Enrollment as of 2011- 2012 is 4100 The Enrollment for the 2006-2007 was 2900 Klein Forest High School----New addition in 2007 and 2011(athletic), wonderfully maintained. and I should mention that the inside of the school feet very modern looking. It looked like the school was around 10-20 years old. But it is 33 years old. Outside It has the third most prettiest campus in the District Enrollment as of 2011-2012 is 3600 Enrollment in 2006-2007 was 3400 Klein Collins High School --Built in 2001 New addition in 2010. Very modern inside. Poorly maintained ex. Ceiling tiles missing latches missing on restroom stall doors It has the 2nd most beautiful(tie) campus in Klein ISD. The Enrollment as of 2011-2012 is 3400 The enrollment for 2006-2007 was 3000 Klein High School original building built in 1963 (now demoed) most buildings were built around the 70's with the exception of the Pavilion(1992), Choir Building (1998), Fine Arts Building(1998), and multipurpose Building (2nd floor of the KISD Athletic Building)(2010) Very Dated in older sections Very Modern in newer sections Poorly Maintained in the entire campus Outside it has the worst campus in the District (construction not considered) even though it is a multibuilding campus The enrollment as of 2011-2012 is 2700. The enrollment for 2006-2007 was 3500