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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:

Joann Jiang, Center Director

Joanne graduated from UC Berkeley with a degree in Applied Mathematics.  She also fluently speaks Mandarin Chinese.  She has been tutoring and mentoring students for over a decade, and joined the Mathnasium team in 2011.  She is driven by a deep desire to help students build confidence and excel in her favorite subject - Math! Over the past few years, she has served multiple Mathnasium centers, providing assistance and support to the different instruction teams.  She brings this experience to the Pasadena center, focussing her energy with this local community,

Sharon Xu, Lead Instructor

Sharon graduated from UCLA with a degree in Chemical Engineering.  She has a passion for math and enjoys sharing that passion with kids of all ages.  When she isn't teaching math, you can find her hiking or playing tennis on her free time. 

Titus Tjahjadi, Regional Director

Titus started his career at Mathnasium as an Instructor in 2007.  Because of his leadership skills, he was promoted to be the Lead Instructor, and then on to be the Assistant Director of the Mathnasium center in Pasadena.  He then served as the Center Director of the Pasadena center before his most recent promotion to Regional Director.  As a Regional Director, Titus oversees the management of the Mathnasium centers in Pasadena, South Pasadena and Monterey Park.  Because of his commitment towards excellent customer service and student progress, he stays passionately involved in student instruction, as well as the training of our team members.

Titus received his Computer Science degree from Cal Poly Pomona.  He is a self-proclaimed foodie, who is not afraid to create his own dishes.  He also enjoys travelling and seeing new sights.