After 15 years of overseeing Crossroads School for Arts and Sciences, a college preparatory day school in Santa Monica, headmaster Roger Weaver plans to step down at the end of the next school year.

In a letter to Peter Norton, chair of the Crossroads School board of trustees, Weaver said it was time for him to step down as school headmaster, as he would like to pursue other personal and professional opportunities.

“Having the opportunity to lead this exceptional school has been meaningful and rewarding beyond measure,” Weaver, who also serves as Crossroads chief executive officer, said in the letter. “Crossroads has taught me so much. It has shaped and defined me as an individual and an educator in profound and gratifying ways.”

Crossroads was founded in 1971 by a small group of educators and parents as a non-denominational coeducational preparatory school. The school focuses on combining academic excellence with a comprehensive fine and performing arts program, community service, athletic challenge and environmental education.

Crossroads, which currently serves 1,133 students on two Santa Monica campuses, has an operating budget of over $25 million and provides $3 million in financial aid to applicant families.

Weaver joined Crossroads as associate headmaster in 1983 and a decade later he was named headmaster. As headmaster, Weaver reports to the board of trustees and supervises all functions of the school.

Weaver said he will be leaving the school at a time of “tremendous strength and vitality,” and he is confident that Crossroads is well prepared for the transition.

Referring to Weaver’s planned departure in June next year, Norton said in a letter that Crossroads has “flourished” under his guidance. With Weaver as headmaster, Crossroads has created a true K-12 (kindergarten-through-12th-grade) identity in parent association and administration, had a substantial improvement in faculty salaries and more than doubled the size of its endowment, Norton said.

Weaver has served in education for more than 35 years. Prior to joining Crossroads, he served as principal of La Jolla Country Day School.

He earned a Bachelor of Arts in English from the University of California, Santa Barbara and a Master of Arts in education from the University of California, Los Angeles.

Weaver has also served on the boards of various educational and public interest organizations, including P.S. Arts Foundation and Eureka Communities Foundation.