Mathnasium Gaithersburg is a math-only learning center that offers customized learning plans, homework help, and test preparation services to students in grades K-12. Our center is open for both online math tutoring and limited In-Center instruction. Math Tutors in your neighborhood. Mathnasium Gaithersburg serves Montgomery County communities in Gaithersburg, Montgomery Village, Germantown, Clarksburg, Laytonville, Washington Grove, Redland, Shady Grove, and Derwood. We offer math tutoring for grades K to 12 and offer an enrichment track. We have helped several students prepare for SAT and ACT tests and improve their scores.