The centre can hold yoga, pilates and aerobics classes for students and staff, and has a hall of fame with a visual display of the school’s sporting history.
Ms Fittock started the volleyball program in 1993 and helped it to become an Education Department approved specialist facility in 2007.
The centre was named in honour of Ms Fittock’s 30 years of teaching and volleyball coaching.
Her coaching also earned her the Australian Volleyball Federation distinguished service award and she was inducted as a life member of Volleyball WA.
She retired in 2011.
Principal Peter Klifunis said $140,000 of the costs were contributed by the P&C.
Residents would have access to the centre after hours.
Riverton and Bateman MLAs Mike Nahan and Matt Taylor were on hand for the official opening.