Mathnasium 2140 E Southlake Blvd, #V, Southlake TX 76092 (817) 421-1900

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Our Team

Our specially trained math instructors will teach your child how to understand math in an individual setting; our unique approach enables us to explain concepts really well and lend a helping hand to every student. Our tutors foster a caring, encouraging environment that helps kids thrive and learn! Read below to learn more about our talented team:

 Anna Grimmer, Center Director

Born and raised in Dallas, TX, Anna has a Bachelor's degree and a Master's degree, both in Mathematics, from Texas A&M University. Anna started working for Mathnasium in August 2014, starting as an Instructor at the Mathnasium of Coppell and working her way up to Center Director there before coming to the Mathnasium of Southlake in 2020. 


Outside of Mathnasium, Anna likes to spend her time reading mystery novels, watching baseball & football, doing puzzles, and crafting (origami & cross stitch are her favorites). She is also newly engaged, and is always looking for wedding planning tips! 

"Who dares to teach must never cease to learn." - John Cotton Dana



 Collin Singleton, @Home Director

Collin has lived in Tarrant county for just over 20 years. He graduated from Carroll High School in 2011 and is now working on a Biology degree in the UTeach Program at the University of Texas at Arlington. Collin loves animals of all kinds, but thinks no dogs are better than his dogs, Snickers, ‘Nilla, and Sadie.

While working as a summer camp intern at the Botanical Research Institute of Texas, Collin discovered a passion for teaching, regardless of subject, and is always happy to see students learn. Outside of work, Collin likes reading Fantasy and Golden age Mystery novels, surfing the web, and hanging with friends.

“Education is the most powerful weapon which you can use to change the world.” • Nelson Mandela

  Frank Mann, Owner

BS Finance, 1981 University of Alabama. Frank spent 18 years in the Convenience Store industry with 7-Eleven, then with equipment suppliers, then with a smaller (55 store) chain in the Deep South. Transitioning to the related downstream fuel industry, he spent 12 years in the fleet fueling business, ending up with a company he founded that provided specialized fueling services following weather disasters, working in the aftermaths of Hurricanes Ivan, Katrina, Gustav, Ike, Irene, and Isaac, as well as several winter storms. Naturally, opening a Mathnasium was the logical next career for Frank!  Frank has 3 kids, two of them Eagle scouts, all of them musically gifted! Married 30 years (to the same wonderfully understanding, ever-patient wife, Deborah), Frank has owned over 40 interesting cars, and if you ever want to know something about Hawaii, please ask, because that is one of his favorite subjects.  Frank owns two additional Mathnasium Learning Centers - Mathnasium of North Dallas and Mathnasium of Tyler.  Frank apparently likes driving on I-20 a lot.