Our Team at Mathnasium of Chino South

Justin S.

Justin earned his Bachelor’s degree in Applied Mathematics from Cal State Fullerton and is currently pursuing his Master’s degree in Mathematics at UC Riverside.

Justin has a genuine passion for both mathematics and education. As Assistant Center Director, he loves helping students build confidence, develop strong problem-solving skills, and discover that math can be both challenging and rewarding. He also enjoys mentoring instructors and creating a positive learning environment for everyone at the center.

Outside of Mathnasium, Justin enjoys rock climbing, hiking, and gaming with friends. He hopes to continue inspiring students through mathematics and one day teach at the high school or college level.

Hansen C.

Hansen is a Computer Science student at Norco College who first discovered his love for teaching through his high school math club, where he helped classmates prepare for math competitions.

Since joining Mathnasium, Hansen has realized that while he loves mathematics, his true passion is education. Working with students each day has inspired him to pursue a future as a math teacher. Nothing makes him happier than watching students go from saying, "I can't," to "I've got this!"

Parents and students appreciate Hansen's patient, encouraging approach and his ability to explain math in a way that makes sense.

Outside of the center, Hansen enjoys solving Rubik's cubes and playing mahjong with his family.

Angelina S.

Angelina is a Computer Engineering major at UC Riverside with tutoring experience both online and in person. She’s passionate about making math fun, clear, and approachable for all learners. Angelina believes humor and connection are key to helping students stay engaged and motivated.  

She takes the time to get to know each student, tailoring her instruction to match their learning style. Whether breaking down tough topics or cheering on small victories, Angelina enjoys building student confidence. Outside of Mathnasium, she enjoys creating music, expressing her creativity, and hanging out with friends. 

Andy C.

Andy is currently studying Construction Engineering and Management at Cal Poly Pomona. He enjoys working with students, encouraging them to challenge themselves, and helping them solve problems they find difficult. He has always been passionate about math and enjoys tackling a variety of math problems. Andy believes that every student learns differently and at their own pace. With patience and the Mathnasium method, he helps students build confidence and master the concepts being taught. His teaching focuses on making learning fun while fostering problem-solving skills and self-assurance. Outside of Mathnasium, Andy enjoys playing golf, traveling, and exploring new cuisines. He has been practicing and competing in golf tournaments for over ten years and loves discovering new places and foods whenever he can.

Linda L.

Linda has earned her Bachelor’s Degree in Biology from University of California, Riverside. Outside of Mathnasium, she has tutoring experience in math, reading, and chemistry. She also has another year of teaching experience in health education. She realizes that a strong body and a strong mind work together. She prefers to be interactive in her teaching by using visual aids to help build students’ understanding of concepts. One of Linda’s favorite things about teaching is being able to see a student’s confidence improve as their math skills soar! Linda has very little spare time because she is currently studying for the MCAT so she can attend medical school.  

Lorenzo R.

Lorenzo is a Business Administration student at Cal Poly Pomona with a strong foundation in mathematics, having completed AP Calculus BC in high school.

Lorenzo has a natural ability to connect with students and quickly make them feel comfortable. His energetic personality and clear explanations make learning math both engaging and enjoyable. Students love working with Lorenzo because he creates a fun, encouraging environment where they feel comfortable asking questions and tackling new challenges.

Outside of Mathnasium, Lorenzo enjoys playing the piano, learning new songs, and playing soccer with friends at the park.

Maiya S.

Maiya is currently attending Cal State Fullerton to earn her Bachelor’s Degree in Communications..She is a very attentive and thoughtful instructor who quickly adapts her teaching to match each student’s learning style. Using the Mathnasium method, Maiya is able to switch strategies as needed to help students grasp concepts and feel more comfortable tackling problems independently. She finds that using visual manipulatives in her explanations is very helpful with this goal. In her free time, you will find Maiya in the kitchen cooking or baking as the wonderful aromas fill her home. Maiya also enjoys playing softball and listening to music with her friends. She has special pets in her life and loves to hang out with her dogs.  

Marsha C.

Marsha holds a Bachelor’s degree in Liberal Studies from California State University, Bakersfield, and a Master’s in Reading from Boise State University. With over 15 years of experience teaching and tutoring, she brings patience, encouragement, and expertise to her work at Mathnasium.  

Marsha is passionate about helping students develop confidence and reach their full potential. She especially loves seeing students light up when they finally grasp a tough concept. Her warm, supportive approach helps learners feel safe to make mistakes, ask questions, and grow at their own pace. 

Johnny W.

Johnny graduated from UC Santa Barbara with a degree in Computer Science and has loved math since he was young, giving him a strong foundation in the subject.

Johnny brings a positive energy to every session and creates a learning environment where students feel comfortable while staying motivated to improve. Although his approach is relaxed and approachable, he encourages students to challenge themselves and holds them to high expectations. Students appreciate his patience, humor, and the confidence he helps them build as they work through difficult concepts.

Outside of Mathnasium, Johnny enjoys playing basketball, gaming, and spending time outdoors.

Rudy S.

Rudy is a Civil Engineering student at Cal Poly Pomona who brings patience, consistency, and strong problem-solving skills to Mathnasium. With a calm and encouraging demeanor, Rudy connects easily with students and adapts his approach to fit each learner’s needs.  

He uses the Mathnasium Method to guide students step-by-step through challenging concepts, focusing on understanding rather than memorization. Rudy also has experience volunteering with children, which enhances his ability to motivate and engage students. One of his favorite things is watching students finally “get it.” Outside of Mathnasium, he enjoys going to the gym. 

Justin B.

Justin has experience helping students succeed in math as a Teaching Assistant and Math Help Center tutor at the University of Massachusetts Amherst.

He earned dual bachelor’s degrees in Mathematics and Physics from the University of Massachusetts Amherst and is currently pursuing a Master’s degree in Mathematics at UC Riverside.

Justin believes that learning math is about more than finding the right answer—it is about developing confidence, critical thinking, and problem-solving skills that students can use throughout their lives. He is passionate about making math engaging, approachable, and enjoyable while helping each student reach their full potential.

Outside of Mathnasium, Justin enjoys hiking, listening to music, and caring for the plants in his garden. He hopes to continue his education and one day become a mathematics professor.