In May, 1950 a group of Christian leaders discussed the formation of a Christian school. By October of that year they had organized "The Christian Education Society of Seattle" and agreed to name the new school Calvin Christian School. Rev. Watson Groen, who played a vital role in the organizing efforts, went to be with The Lord. The school was named Watson Groen Christian School in his honor. In 1997, the school was renamed Shoreline Christian to more accurately reflect a mission and a location.

The preschool/childcare is located in the basement of the First Seattle Christian Reformed church which sits adjacent to the school's parking lot. There are three school buildings - elementary K-6 and the Jr. & Sr. High, plus the gym. The facility also has an all-weather surfaced outdoor athletic area with the elementary playground in a forest setting. Both classroom buildings have a library with the computer network access and there is an art room in the High School. Each upper grade is limited to 30 students with the elementary grades to 25. Capable, committed, caring teachers are available at every grade level.

Organization
Shoreline Christian is owned and operated by the Shoreline Christian School Society, a non-profit corporation. Membership is comprised of many parents and others interested in Christian education. Society members elect the School Board. The Board makes policy decisions, hires the Administrator and recommends the annual budget to Society members for approval. Parents and staff serve on a number of committees, e.g. Advancement, Admissions, Buildings and Grounds, Education, Endowment, and Finance.