Eastside Prep was founded in May 2002 by a group of parents and educators seeking more school choice, with a focus on interdisciplinary work and strategic thinking.

In fall of 2018 TALI Hall opened; a 50,000 square foot building housing a 500+-seat theatre, art studios, a set shop, instrumental and choral music rooms, science labs, general purpose classrooms and administrative offices.

It is also a member of the National Association of Independent Schools and recognized by the Washington State Office of Superintendent of Public Instruction.

[3] In addition to all courses required by the Washington State Graduation Requirements, Eastside Prep offers a multi-year Spanish curriculum, numerous core options and electives in the English, History, Social Sciences, Fine and Performing Arts, Mathematics, Sciences, Environmental Practices, Technology, Information Literacy and Media.

[11] Afternoon activities at Eastside prep include teams for Math, Debate and FIRST Tech Challenge Robotics, as well as over twenty-five other student-driven clubs.

[14] In addition to Physical Education courses, Eastside Prep offers a number of afternoon sports.