Our staff is built to teach each student individually, to develop the skills they need to thrive in mathematics, and to foster a love of learning.


Lead Instructor
Josue was born and raised in Los Angeles, and had the fortunate experience to attend UC Irvine, where he learned how big the world is, met my other half, and led and expanded an engineering student organization. After leaving UCI, Josue thought a lot about his future, and he thought a lot about what led him to this point. One thing he'll never forget is his math teacher in 9th grade that didn't give up on him when he was struggling in school. It took Josue a bit of time, but he ultimately decided that he wanted to pursue teaching, and help guide others the same way that teacher did for him. Being an instructor here is Josue's first step, and he hopes to inspire our students and help them learn how vital math is. In his free time, Josue is developing a video game with friends, likes listening to records for hours, and working on various open-source projects.


Lead Instructor
Tammy was born and raised in Los Angeles and is currently studying Applied and Computational Mathematics and minoring in Russian at USC. She has always had a passion for science and math education, and loves working with kids. She started at Mathnasium over 4 years ago, and came back to the company recently. In her free time, she likes to read, crochet, and swim.


Ruben is from Los Angeles, California. He attended California State University Northridge to major in Mathematics and is currently an instructor in Mathnasium. Ruben seeks to help students understand math in a fun and less stressful way which hopefully leads them to enjoy math. Some of Rubens interest are sports, gaming, and foreign language.


Huyen was born and raised in Vietnam and migrated to the U.S. in 2017. She had the fortunate experience to attend UCSD and graduated with a bachelor's degree in Mathemetic Probability and Statistics. Huyen enjoys working with kids and decided to be a part of Mathnasium since she had a chance to volunteer at an orphanage in high school. Huyen loves to help math students feel more confident in solving problems and exploring new knowledge. In her spare time, Huyen enjoys reading and sharing meaningful movies on her blog.


Kenneth Guevara is a graduate from Cal State University, Dominguez Hills, where he earned his Bachelor’s Degree in Mathematics Education. With the help and encouragement of experienced math instructors, he has developed both an interest in math and a desire to help others with their understanding of the subject. Over the years he has tutored many people in math, including classmates, other students, and even some of his neighbors. Much of his tutoring experience comes from working with high school and college students who were taking Algebra courses. Kenneth is very helpful and will help math students understand any areas of confusion or difficulty. In his spare time, Kenneth enjoys reading, bike riding, chess, and video games.


Marcus was born and raised in Los Angeles, California. He attended Cal State LA with a focus on Psychology. Marcus strives to work with children and develop strong relationships with them. His goal is to create a comforting environment where students feel safe and supported in any activity they're engaged in. He's currently working on his Masters Degree with a focus on School-Based Family Counseling in order to provide socio-emotional support for students. He works at Mathnasium to gain more experience working with kids and to support them with their math goals. His hobbies and interests include playing basketball, pool and various musical instruments.

Dan Saposhnik

Director of Operations
Dan graduated from the University of Arizona in 1985 with a B.S. in Microbiology and from Hofstra University's Graduate School of Business in 1990 with an MBA in Accounting. He worked as a CPA with public accounting firm Price Waterhouse and has built successful companies in various fields including real estate and executive recruiting. Dan's passion for teaching and love for working with kids is rooted in family tradition. His mother was a highly regarded principal in Las Vegas for nearly 30 years. Dan has taught and tutored children of all ages and was a mentor for underprivileged children. Dan is committed to significantly increasing Hancock Park children's math skills, their understanding of math concepts and their overall school performance. "We provide lots of warm encouragement in a very positive learning environment so that children build their confidence and develop a winning attitude towards math. Our kids learn math in a way that makes sense to them. They get excited about math and this spirit carries over into everything they do."

Laurie Wasser Saposhnik

Director of Marketing and Community Outreach
Laurie graduated from UCLA in 1986 with a B.A. in Communication Studies. Prior to joining Mathnasium, Laurie worked for various Fortune 500 high tech companies such as IBM, SAP, EMC, TIBCO and MicroStrategy. Laurie's passion for teaching and love for working with kids is rooted in family tradition. Her father taught special education at the high school level for over 30 years in California. Laurie is committed to partnering with the Hancock Park community to increase Hancock Park children's math skills, their understanding of math concepts and their confidence in their ability to be successful.

Our Mathnasium Mission

Teach children math so they understand it, master it, and love it. Math can change their lives, and they can change the world.

What I love about Mathnasium is the ability to teach problem-solving skills and make math make sense, while also making a student smile.
Amber W., Mathnasium Instructor

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