E. Thompson
We have been members of Mathnasium since August 2025 and are having a very positive experience. The instructor...
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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 math tutors work with students across the 92007, 92009, 92011, 92024, and 92078 zip codes. We proudly serve families throughout the Carlsbad and nearby areas, 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
Mathnasium of La Costa's personalized programs are designed to support students at every stage of their math journey.
Young learners in preschool and kindergarten explore early math through interactive, playful instruction designed to develop number sense, spark curiosity, and establish a solid foundation.
We help grades 1–5 students master fundamental skills—addition, subtraction, multiplication, division, fractions, decimals, and percents—while building understanding and confidence needed to succeed in the classroom.
Our program supports middle schoolers with any topic or course—from Prealgebra to Geometry—in a fun, caring environment where abstract concepts become clear and manageable.
High schoolers receive personalized support for rigorous courses, including Algebra, Trigonometry, and Precalculus, along with focused preparation for PSAT®, SAT®, ACT®, and other college admissions math assessments.
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
Mathnasium of La Costa is located in Carlsbad, California, near La Costa Town Square.
We proudly serve families in La Costa and the surrounding Carlsbad neighborhoods. Local schools we support include:
La Costa Heights Elementary School
La Costa Meadows Elementary School
Mission Estancia Elementary School
Diegueño Middle School
Aviara Oaks Middle School
La Costa Canyon High School
San Marcos High School
Yes. Mathnasium of La Costa offers both in-center and online tutoring.
All our students receive face-to-face instruction in a supportive group environment and work with the same caring tutors, whether they choose to attend in person or online.
No, there is no difference between in-person and online tutoring at Mathnasium of La Costa.
Students who opt for online math tutoring will receive the same quality of live, face-to-face instruction and work with the same tutors as they would in our La Costa center.
We can help students learn and master any K-12 math class and topic! Depending on their learning needs, students come to us for support with early childhood math, including basic arithmetic, Prealgebra and Algebra, Geometry, Trigonometry, Precalculus, and Calculus.
Our specially trained tutors follow plans that are designed around each student’s skill level, learning style, and academic goals, so they can make meaningful progress during our sessions.
Mathnasium of La Costa provides premium value math tutoring by combining superior learning experience with an efficient structure that keeps costs low.
There is a flat enrollment fee for our program, and students attend regularly.
We recommend that they attend Mathnasium 2-3 times per week as attending less frequently will slow results and attending too often could lead to student burnout.
Pricing varies by program and geographic area. Contact us at [email protected]m for more details on enrollment packages.
No, Mathnasium of La Costa’s membership fees are the same for online, in-center, and hybrid tutoring.
At Mathnasium of La Costa, students begin the enrollment process with a diagnostic assessment designed to help us identify their learning style, needs, and goals.
Using assessment-based insights, we create a learning plan that will help them truly understand and even start to enjoy math, making meaningful progress at their own pace.
At Mathnasium of La Costa, we do not follow a traditional curriculum. We use our proprietary approach called the Mathnasium Method™, which combines personalized learning plans with proven techniques to build math knowledge upon what students already know, so they're able to retain what they learn and gain confidence along the way.
Mathnasium of La Costa works with students of all skill levels, empowering them to unlock their math potential.
Students who are behind in math receive targeted support and caring guidance focused on (re)building their foundational skills and confidence. Advanced learners benefit from enrichment opportunities designed to keep them engaged by challenging their thinking and introducing them to topics beyond their school curriculum.
Yes, our specially trained math tutors work with all K-12 students, whether they are homeschooled or attending a private or public school.
Yes, our La Costa math tutors will set aside the time during each session to help students with their homework.
No. All learning occurs under the efficient and effective guidance of our trained tutors.
Yes, we prepare K-12 students for school and standardized math tests, including state exams, ACT®, SAT®, and PSAT®.
Mathnasium of La Costa’s test preparation programs follow learning plans tailored to each student’s strengths, pain points, and goals, empowering them to excel both on the exam and their math journey.
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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 - 6:30PM
Tue
2:30PM - 6:30PM
Wed
2:30PM - 6:30PM
Thu
2:30PM - 6:30PM
Fri
2:30PM - 6:00PM
Sat
10:00AM - 1:00PM
Mon - Thu
2:30PM - 6:30PM
Fri
2:30PM - 6:00PM
Sat
10:00AM - 1:00PM
| Mon: | 2:30PM - 6:30PM |
| Tue: | 2:30PM - 6:30PM |
| Wed: | 2:30PM - 6:30PM |
| Thu: | 2:30PM - 6:30PM |
| Fri: | 2:30PM - 6:00PM |
| Sat: | 10:00AM - 1:00PM |
| Mon - Thu: | 2:30PM - 6:30PM |
| Fri: | 2:30PM - 6:00PM |
| Sat: | 10:00AM - 1:00PM |
(760) 452-6150
(760) 452-6150
