Popular Tustin Unified School District teacher Ian Williamson died May 22 after a 10-year battle with skin cancer. He was 43.

A memorial service will be held at 6 p.m. Saturday, June 10, in the Sports Pavilion at Tustin High School, 1171 El Camino Real.

A graduate of Tustin High, Williamson began working for the district in 2001 as a math and science teacher at Utt Middle School. The marathon runner also coached the cross-country team and taught a technology program.

In fall of 2016, Williamson transferred to Tustin High, where he taught human anatomy and started a biomedical science class.

A Facebook page called “Thank You Mr. Williamson” has been created in memory of the teacher.

“Mr. Williamson had a contagious smile. A smile always so vibrant and warm,” an anonymous former student wrote on the page. “He never failed to make his students feel welcome in his classroom. I will never forget how excited he got — how his eyes lit up, and his smile covered his whole face.”

Another student recalled: “I will always remember how Mr. Williamson would go 100 percent every day in class, and that was reflected in how much he impacted us — not just through the way he taught science, but the way he changed his students’ lives.”

Remembrances will be compiled into a book for the Irvine resident’s wife and son.

In lieu of flowers, donations can be made to the “I Will Fund for Science Education” through the Tustin Public Schools Foundation, tpsf.net.