With The Math Mentors, students develop organizational skills, discover their motivation and engage their curiosity. We are committed to catering to the needs of the families we serve by offering individualized tutoring and academic guidance.

Meet the Mentors!

Meet Othelia Sierra, founder of The Math Mentors.  She graduated with a Bachelor of Science degree in Mathematics from Millersville University in 2016 after completing an Associate's in Physical Science from Harrisburg Area Community College. After struggling to find employment after graduation she decided to pursue her dream of becoming an entrepreneur.

From an early age, she has enjoyed learning math and is grateful to have turned that passion into her purpose. Othelia's favorite subjects to tutor are Geometry and Algebra.​​ Students admire her clear explanations and passionate approach to teaching.

For fun, Othelia instructs and performs acrobatics with The Circus School of Lancaster. She also enjoys sharing nerdy math puns with her friends.


Peter Anderson completed his formal education in 1988, and then engaged in a wide variety of employment pursuits over the years. In 2002, he began working with a small math curriculum publishing company, and during his 12 years there, he had the opportunity to gain math and teaching skills through courses and practical hands-on experience.

Having recognized the difficulty that many teachers face in trying to keep up with a rigorous teaching schedule while meeting the needs of a full classroom, Peter made the decision to focus on helping individual students gain an intuitive grasp of mathematical concepts. His greatest joys as a tutor are reducing students' fear of math and helping them to succeed academically. In his spare time, Peter enjoys honing his mathematical and teaching skills through continued study and practice.