1981
Prospect School opens its doors in the Friends Church in Berkeley
1983
Sierra School opens its doors in the Bethlehem Lutheran Church in Berkeley
1988
Prospect School buys El Monte School site at 2060 Tapscott Avenue, El Cerrito
1993
Sierra School buys Del Mar School site at 960 Avis Drive, El Cerrito. Sierra had leased the school since 1987.
1996
Prospect and Sierra begin planning to merge and create a new K-8 school
1997
Prospect Sierra opens. New science and technology labs for the middle school are completed before the start of the new school year.
1998
Strategic Plan 1998-2003 adopted
1999
Middle school renovation creates new sports and performing arts center.
First eighth-grade class graduates
2001
The Board of Trustees moves forward with the initial phase of campus improvements outlined in the Facilities Master Plan. Construction begins.
2003
New libraries and classroom space at each campus, as well as new art, science, and music classrooms at the elementary school, open when students arrive in the fall
2004
Strategic Plan 2004-2009 adopted
2004-05
Capital Campaign launched for new Arts and World Language classrooms on the Middle School campus






