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Our experience at Mathnasium has been wonderful. The instructors are patient, friendly, and truly care about h...
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For high-achievers who are ready for the next level, Mathnasium Plus takes students beyond grade-level math and builds advanced thinking that creates lasting advantages.
Our Results
94%
Math Skills
of parents report an improvement in their child’s math skills and understanding.
93%
Attitude
of parents report improved attitude toward math after attending Mathnasium.
90%
Success
of students saw an improvement in their school grades.
Our Results
The Proof Is In The Numbers
Math Skills
of parents report an improvement in their child’s math skills and understanding.
Attitude
of parents report improved attitude toward math after attending Mathnasium.
Success
of students saw an improvement in their school grades.
Our La Costa tutors use the Mathnasium Method™, our proprietary teaching approach that combines personalized learning plans with mental, verbal, visual, tactile, and written techniques to build math knowledge level by level.
Schedule Free AssessmentOur caring, specially trained math tutors provide face-to-face instruction in a supportive and engaging learning environment. We work with students of all skill levels, both in-center and online, to help them achieve math mastery.
Discover how Mathnasium tutors helped Malachi become more confident in math.
Each Mathnasium student receives a personalized learning plan that considers their current skill level, knowledge gaps, and academic goals. Combined with our teaching approach, the plan is designed to help the student truly understand, master, and enjoy math.
Discover how Mathnasium helped Maddie transform her math skills. Initially struggling with the lowest math grades in her class, Maddie worked with our tutors using a personalized approach tailored to her specific needs.
Math Tutors Near You
Mathnasium’s specially trained tutors work with K-12 students in and near La Costa area of Carlsbad. We proudly serve local communities and schools, including:
Specially Trained and Caring Team
Youngkun Weiss
Director of Operations
Youngkun's journey in education began with his pursuit of a bachelor’s degree in Pure Mathematics at Revelle College, University of California San Diego (UCSD). However, his passion soon shifted towards math education, prompting him to change his major to focus on secondary education. Since 2013, Youngkun has been actively involved in tutoring and various educational initiatives, demonstrating his commitment to education both within and beyond academia.
In January 2015, Youngkun became an instructor at Mathnasium, driven by a desire to make a direct impact on students' mathematical experiences. His dedication and leadership abilities quickly became evident, and by late 2017, he had transitioned to the role of Center Director. His continued success led to his promotion to Director of Operations in early 2023, where he now oversees multiple Mathnasium centers, including those in San Diego, Phoenix, Denver, Dallas, and Cincinnati.
Youngkun firmly believes that every student deserves to approach math with confidence. He is a staunch advocate of the Mathnasium method, which emphasizes a deep understanding of mathematical concepts and aims to eliminate the fear of math that often impedes student progress.
Committed to fostering the personal and professional growth of both instructors and students within his region, Youngkun strives to create an environment where learning math is a positive and empowering experience.
Karen Lossing
Executive Director
Karen is a powerhouse in the world of education, with a mission to make math click for every child. Karen’s career in education began in 2004 when she noticed her son was falling behind academically and wanted to help him and students like him get the best support available. Karen earned her master’s and teaching certificate and became a classroom teacher. During her years of teaching, she worked as an interventionist and district liaison for math curriculum and instruction.
After nearly a decade working in schools, Karen shifted gears to supplemental education in 2013 and opened the doors to her first Mathnasium franchise. Karen's first learning center has been recognized as a top performing location for several years in a row.
In addition to the work she does at her learning centers, Karen has served on the Mathnasium Franchise Advisory Committee, where her influence has been instrumental in shaping the company's direction and curriculum. Her efforts have led to the frequent adoption of new curriculum and student management systems, ensuring Mathnasium offers the best possible tools to help students excel and instilling confidence in her leadership.
Some of Karen’s achievements include:
Today, Karen and her family own a network of Mathnasium Learning Centers, empowering K-12 students to unlock their full math potential.
Libby Lossing
Director of Marketing
Libby brings a dynamic blend of leadership, education, and community spirit to her roles as Director of Marketing at Mathnasium.
Prior to joining the Mathnasium team full time, Libby attended the University of California, Los Angeles, where she was the Captain of the UCLA Spirit Squad and traveled the country as the school’s mascot. This multifaceted experience allows her to connect with a wide range of people and fosters a collaborative and engaging atmosphere in her work. In addition to her bachelor's degree from UCLA, Libby holds a certificate in School Management and Leadership from the prestigious Harvard School of Education and Business School.
Some of Libby’s exceptional achievements include:
A key member of the Mathnasium team since 2017, Libby is dedicated to creating a positive and enriching learning environment for all students.
Evan Lossing
Director of Human Resources
Evan's journey at Mathnasium began in 2013 as an Instructor. His passion for math education stemmed from his own academic journey. In elementary school, Evan overcame challenges in math with supplemental support, ultimately excelling and earning a spot in the accelerated program by high school. Fueled by a desire to help others experience similar success, Evan pursued a bachelor's degree in business management at Texas Tech University. Upon graduating, he leveraged his education and Mathnasium experience to excel as our Director of Human Resources.
Evan is relentlessly committed to providing exceptional customer experiences. His passion for understanding and meeting the needs of our students and their families drives him to continually seek out new knowledge and strategies. From staying on top of industry trends to immersing himself in educational podcasts and webinars, Evan is always on the forefront of customer service best practices. His dedication to creating positive and lasting relationships with our students and their families is evident in everything he does.
Evan recognizes that happy employees who are thoroughly trained and fully engaged with the work they’re doing produce the best results. Evan hosts weekly trainings and has built continued education programs to empower our team to continue to best themselves. His work was recognized by our headquarters and he was invited to help build national training programs to benefit our entire franchise network.
Some of Evan’s achievements include:
Steven Lossing
Executive Director
From early childhood through high school, La Costa's math programs are designed to support students at every stage of their math journey.
We introduce preschool and kindergarten learners to foundational math concepts through hands-on, playful instruction that builds number sense while fostering curiosity and confidence from the very start.
For students in grades 1–5, we focus on developing a solid understanding of concepts like addition, subtraction, multiplication, division, fractions, and decimals, making math clear and enjoyable.
We help middle schoolers navigate classes like Prealgebra and Geometry by breaking down abstract ideas into manageable steps in a supportive environment where understanding and confidence grow.
High school students receive targeted support for Algebra, Trigonometry, Precalculus, and standardized math test prep that positions them for academic success and future college admissions opportunities.
Students can take 3 easy steps to enroll at Mathnasium.
All students begin their Mathnasium journey with a diagnostic assessment that pinpoints what they already know and what they still need to learn.
FAQ
Make this the year your K-12 student finds their math mojo! Enroll in January 2026 and Save $100!
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Elementary school students who can recall their math facts with accuracy, efficiency, and underst...
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Contact Us
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3451 Via Montebello, #190
Carlsbad, CA 92009
| Call: | (760) 452-6150 |
| Text: | (760) 452-6150 |
| Email: | [email protected] |
Mon
2:30PM - 7:00PM
Tue
2:30PM - 7:00PM
Wed
2:30PM - 7:00PM
Thu
2:30PM - 7:00PM
Fri
2:30PM - 6:00PM
Sat
10:00AM - 1:00PM
Mon - Thu
2:30PM - 7:00PM
Fri
2:30PM - 6:00PM
Sat
10:00AM - 1:00PM
| Mon: | 2:30PM - 7:00PM |
| Tue: | 2:30PM - 7:00PM |
| Wed: | 2:30PM - 7:00PM |
| Thu: | 2:30PM - 7:00PM |
| Fri: | 2:30PM - 6:00PM |
| Sat: | 10:00AM - 1:00PM |
| Mon - Thu: | 2:30PM - 7:00PM |
| Fri: | 2:30PM - 6:00PM |
| Sat: | 10:00AM - 1:00PM |
(760) 452-6150
(760) 452-6150
