Pupils at Cressex Community School in High Wycombe have buried a time capsule as part of the ceremony to mark the rebuilding of their school.
Tahira Aslam, head girl, and Farid Jafari, head boy, performed the ceremony.
The time capsule contained pupils' predictions for the next 100 years, a list of key questions that they hope will be answered, a list of top 10 "must have" items for young people in 2009 and a Cressex school tie. The school is the only one in Buckinghamshire to be rebuilt under the Building Schools for the Future programme.
The #163;31 million development is due to open in September 2010 - following a five-year fight for funding to replace 18 buildings. During its 2007 inspection, Ofsted said that the accommodation at the school was 'unsatisfactory and not conducive to learning'.
Cressex is a non-selective school in an area where grammar schools take four in 10 pupils. HW.