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Thomas Leth Obituary
February 8, 2022
Thomas Dean Leth, longtime resident of the SCV and favorite science teacher at Hart High School for decades, passed away peacefully in 2022. He was 87.
Born in Oak Park, Illinois, son of the state budget director, Tom earned a Master's in Organic Chemistry from the Illinois Institute of Technology, then met his wife Silvia in Indianapolis while working as a chemist for Eli Lilly. In 1970 they married and moved out to California. Teaching was his passion, and from the early 1970s to the mid 1990s, Tom taught chemistry and physics at Hart. Many of his students pursued careers in the sciences, business, sports, media and even politics. Tom was well known around town and frequently bumped into former students.
For years, Tom was a regular in the local bowling leagues, and operated the Hart football scoreboard. He also enjoyed golf, tennis, skiing and hiking; he and Silvia re-kindled the local chapter of the Sierra Club in the early 1980s.
Tom was of course most proud of his three sons, David, Peter and Jeremy, all of whom were born and raised in the SCV. Tom is survived by them, as well as Silvia, and four grandchildren.
To plant trees in memory, please visit the Sympathy Store.
Memories and Condolences
for Thomas Leth
3 Entries
Sandy P.
May 10, 2025
RIP Mr Leth! You were my favorite teacher at Hart HS! I enjoyed your 'unique' sense of humor, and all of your stories that you shared in Physics class (Hart '82). You will always be my favorite teacher from Hart HS (stated in the yearbook).
My condolences to your family, he will never be forgotten!!
Ann Snyders
May 28, 2024
So fun to see you and your identical twin brother, my dad, Ted interact. I always felt you were a good sounding board and second father´s opinion. Helped me develop my interest in tennis and ping pong!
Chuck Kokoska
May 26, 2024
RIP Mr. Leth. Had you for Science in the 70´s. You´re responsible for my love of Science.
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