Mary Elizabeth Brillhart was born in Perryton, Texas, on September 16, 1942. She was the salutatorian of the Canyon High School Senior class in 1960. She received a Bachelor of Science from West Texas State College in 1963 and a Master of Math Education from West Texas State University in 1965.
Ms. Brillhart returned to Canyon High to do her student teaching with Ray Wells in the Spring of 1963. She would teach in Austin, San Angelo, and Amarillo before returning to her Alma Mater when Mr. Wells retired in 1968. She would be the cheerleader sponsor for nine years and would then work with Canyon students as student council sponsor for seven years. She taught Algebra I, II, geometry, trigonometry, analysis, mathematics of money, mathematics of consumer economics, TAAS review, pre-calculus, and AP Calculus-AB.
Ms. Brillhart was head of the math department and lead teacher of Advanced Placement. She was the class sponsor for the classes of 1972 and 1986. She is a life member of the Texas State Teachers Association and the National Education Association. She has been a member and an officer in both the Canyon Classroom Teachers Association and the Zeta Epsilon chapter of Delta Kappa Gamma. She is now a member of Canyon Retired Teachers and School Personnel. Since 1972 she has been on the Education Credit Union board of directors and has been chairman of the board since 1986.
Ms. Brillhart retired from Canyon High School in 2000 and Married John D. Sommer, who is also a member of the Canyon High School Hall of Fame. They now live in Round Rock, Texas.