Mathnasium 6955 Broadway, Lemon Grove CA 91945 (619) 483-3160

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Covid-19 Update: In-person sessions will be scheduled to maintain proper distance between students. We will also be keeping the online learning platform as a permanent part of our program. Online hours are 2pm-7pm, in-center hours are 4pm-7pm.

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:

Kristi Eugenio, Owner / Center Director 

Kristi is one of the Owners and Center Directors at Mathnasium of Lemon Grove. Before opening her own center with her childhood best friend, Kristi tutored and taught students of all ages, even at other Mathnasiums. She has an Associate's degree in Applied Mathematics and over 10 years of tutoring experience. Kristi is enthusiastic about helping every child in the community to truly understand math by teaching it the way that makes sense to them. Kristi does all of the events and community outreach, so if you are interested in seeing how Mathnasium of Lemon Grove can be a part of your next event, reach out to her!

Favorite number: 9 because it's the day I was born.

Favorite math joke: What did 0 say to 8? ... Nice belt!

I love Mathnasium because: It helps reach students who would otherwise struggle. Mathnasium is able to rebuild confidence, show students that they are capable, and help students realize their potential.

Brea LeeBrea Lee, Owner / Center Director

Brea is one of the Owners and Center Directors at Mathnasium of Lemon Grove. Brea graduated from Southwestern College with her AA in Computer Science and a BS in Web Design and Interactive Media from the Art Institute of California. She began tutoring in middle school by assisting her elementary teachers and it has been one of her passions ever since. She has an interest in all things 'nerdy' from programming and robotics to video games and fantasy novels. She also has a passion for music, and loves to attend concerts in her free time to support the local music scene.


Favorite number: 4, because her birthday is the 4th and her first name is four letters long.

Favorite math joke: What do you call a snake that’s 3.14 feet long? A π-thon!

I love Mathnasium because: Mathnasium can help any child get better at math, no matter where their skills are! We help students see that math can be fun and rewarding.

Rudy G., Lead Instructor

Rudy has a Bachelor's in Business Marketing and worked in customer service and sales in a high pressure sales environment for the past 4 years. At some point, his previous job stopped satisfying him, though he loved many aspects of it. Hence, Rudy quit his job. Now he works at Mathnasium and he is looking forward to a somewhat relaxed future. He plans on getting a bilingual teaching credential in foundational mathematics.  

 Favorite number: 7, number of people in his immediate family

Favorite math joke: Why was 6 afraid of 7? Because 7 ate 9!

I love Mathnasium because: It's friendly and promotes a healthy learning environment. 

Itzayana O., Lead Instructor

Itzayana is a transfer student at CSU San Marcos studying biology. As much as she loves biology, she's always had a soft spot for math and working with children. Itzayana was a special education assistant at the San Diego Unified School District for three years and enjoyed every minute of it, especially when they did math activities with the kids. She also has a passion for animals and music. Dogs are her favorite animals and she played percussion for nine years.

Favorite number: 2, because it's my lucky number.

Favorite math joke: Why is 6 afraid of 7? Because 7, 8, 9.

In five years I will be: Happily working at a research facility and perhaps starting a family.

I love Mathnasium because: I love being able to work with kids and helping them out with one of my favorite subjects, Math!

Timm J., Lead Instructor

Timm graduated with a degree in Statistics at San Diego State University in 2016 and he aspires to be a World History Teacher in High School (although he has succeeded in Mathematics through school, he has a huge passion for Ancient History/Warfare and Mythology). His hobbies include playing video games, binging anime, analyzing Pro MMA Fights, reading up on History, and always searching for new, random things to try. 

Favorite number: 7 because it's lucky, and there's nothing wrong with relying on a bit of luck (and Probabilities) in your life!!!

Favorite math joke: What's funnier than 24? 25!!!

In five years I will be: A High School World History Teacher. 

I love Mathnasium because: I love interacting with all the Students at Mathnasium, listening to their stories and helping them succeed. Furthermore, I absolutely ADORE how much I learn EVERYDAY I spend at Mathnasium. 

Tony B., Instructor

Tony is a long-time resident of San Diego. He is a graduate of Chula Vista High School, Southwestern College, and San Diego State University. He has worked as a gardener, an electronics engineer, a software engineer, a research assistant, a housekeeper, a cartographer (map maker), an Information Technology teacher, and a classroom assistant at Juvenile Hall. Tony has been helping people with mathematics his whole life. 

When he's not working, Tony likes to go for long walks, and bike rides. He LOVES libraries. 

In his home, Tony has five bookcases loaded with interesting books. Education, Sociology, American history, and Spanish are his favorite topics. 

Favorite number: 1024 because 1024 bytes is a kilobyte and 1024 kilobytes is a megabyte and 1024 megabytes is a gigabyte and 1024 gigabytes is a terabyte.  

Favorite math joke: When rectangle married triangle, triangle remarked, “At least I didn’t marry a square”, and rectangle responded, “and I’m glad you’re not always right.”

I love Mathnasium because: When we make mistakes, we learn something new, and our understanding of mathematics becomes deeper and more sophisticated.

Kevin M., Instructor

Kevin is originally from Simi Valley, California. He is currently studying finance and applied math at San Diego State University. He joined Mathnasium to help students learn more effective ways to work through math problems. Some things he enjoys are learning new things, reading, listening to music, and poker.

Favorite number: 2, because it is the base for binary.

In five years I will be: Still figuring out where he will be in five years.

I love Mathnasium because: The students are awesome.

Desirae B., Instructor

Desirae received her Bachelors degree in Mathematics for single subject teaching this past May! She has tutored at Lincoln High School and currently tutors at Helix High School. Desirae enjoys driving around and getting lost with her friends, watching the sunset at the beach, and hiking. She also plays softball in her free time. 

Favorite number: 27 because growing up she was a competitive softball player and her all time favorite softball player Jennie Finch was 27. It has been her number for softball since the age of 10! 

In five years I will be: a Math teacher on the East Coast. 

I love Mathnasium because: Mathnasium gives us an opportunity to work with students of all ages and build amazing relationships with awesome students through math! 

Charles M., Instructor

Charles earned a Bachelor’s Degree in Psychology from San Diego State University (SDSU) in May 2018. After taking a year off from school, he is back at SDSU pursuing a Master’s Degree in Education with a concentration in Counseling. Even though he is studying to become a counselor, he has always had a passion for math and believes that being an Instructor still fulfills that essence of helping people. His hobbies include exercising and binge-watching anime/Netflix series.

Favorite number: 26, because that’s the day he was born!

Favorite math joke: Think of a number between 1 and 10. Multiply it by 9 and subtract 1. Now close your eyes. It’s dark isn’t it?

In five years I will be: A counselor! As for what type of counselor I want to be, that’s for me to find out in the future!

I love Mathnasium because: There’s always an opportunity to learn something new! I also appreciate the “family” atmosphere that Mathnasium promotes!