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Head Coach

Karen Lemker is in her 31st year as the head coach of the girls’ basketball team at Tomball High School and her 36th year of teaching and is eagerly awaits the upcoming basketball season.  Coach Lemker graduated from the University of Texas @ Arlington where she played at the collegiate level with certifications in Physical Education, Health and Mathematics.  Coach Lemker earned her Master’s Degree in Educational Administration from PVAMU.  Karen began her coaching career at Cypress Creek where she was an assistant coach for 5 years. In the past two years, Lemker has led the Lady Cougars to the Regional Finals and Regional Quarterfinals and strongly believes in the potential of this year’s team to make another playoff appearance.


Assistant Coaches


Tony Vo begins his 4th year at Tomball High School and his 14th year in coaching.  He attended Klein Forest High School, received his Bachelor's degree from University of Houston and a Master’s in Educational Technology Leadership from Lamar University. Coach Vo has been married for 10 years to his lovely wife Kham and has two children: Noah 6 and Evan 1.


Cheri Wallace was raised in south Texas. She graduated with a Bachelor of Arts in Education and is in her 15th year at Tomball as a coach and educator in the science department.


Crystal Sales is a 1994 graduate of Tomball High School where she was a member of both the 1993 and 1994 State Softball Tournament teams. She graduated college from The University of Texas at San Antonio with a B.A. in English Literature and also played 1st base for the Roadrunners. Coach Sales has had the honor of playing softball against many Olympic teams including USA, Japan, Italy, Chinese Taipei, and The Netherlands. This is her first year at Tomball and her sixth year teaching/coaching. She will be teaching World Literature (English II) and coaching softball and basketball. In her spare time she enjoys interior design as well as travel, and is excited to be a Tomball Cougar once again!


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