J. Pio
My 6th grader has been a Mathnasium 4S Ranch student for the last 9 months and I am very pleased with the resu...
See more reviews here




J. Pio
My 6th grader has been a Mathnasium 4S Ranch student for the last 9 months and I am very pleased with the resu...
See more reviews here
Mathnasium of 4S Ranch's personalized math test prep programs are designed to help students at every level feel confident and prepared on exam day.
We help K–12 students prepare for upcoming quizzes, unit tests, and final exams across any math class, from elementary math through Precalculus and beyond. Using personalized learning plans, our tutors target the exact concepts students need to master so they walk into every exam feeling ready.
We prepare students for the math portions of the State of Texas Assessments of Academic Readiness (STAAR) by identifying knowledge gaps and building the skills and understanding needed to meet and exceed grade-level expectations. Our tutors align instruction with Texas standards to ensure students are fully prepared for test day.
We help high school students build and enhance the math skills needed to excel on the SAT®, PSAT®, and ACT®. Our specially trained tutors use proprietary test prep materials and personalized learning plans to build both the content knowledge and problem-solving strategies that lead to stronger scores.
At Mathnasium of Greatwood, our specially trained math tutors help K–12 students prepare for any math exam, from classroom quizzes and state assessments to college admissions tests like the SAT®, PSAT®, and ACT®.
We provide personalized, face-to-face instruction in a caring and fun group environment. Our tutors identify exactly where each student needs support, teach for understanding rather than memorization, and guide students step by step so they feel confident and prepared on exam day.
We use the Mathnasium Method™, our proprietary teaching approach designed to promote math mastery and build the deep understanding students need to perform well on any exam.
Our tutors combine proven interactive techniques with personalized learning plans and proprietary test prep materials, helping students not only learn the content but also develop the problem-solving strategies and confidence they need to succeed.
Every student's Mathnasium journey begins with a diagnostic assessment that helps us identify their current skills, knowledge gaps, and test prep goals. Using these insights, we create a personalized learning plan focused on exactly what each student needs to improve.
With the plan in place, our tutors deliver targeted, supportive instruction that adapts in real time to each student's progress. This approach ensures students strengthen the right skills, fill knowledge gaps, and build lasting confidence as they prepare for their exam.
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.
Math Test Prep Near You
We empower students in 4S Ranch to excel in any K-12 algebra class, with a focused, caring, and fun learning approach that delivers results. We proudly serve local communities and schools:
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
Whether they would like to attend sessions in-center or online, 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 the algebraic concepts they still need to learn.
FAQ
The number of sessions depends on your student's current skill level, the exam they're preparing for, and how much time is available before test day.
As a general guide, most students preparing for a major exam such as the SAT®, PSAT®, or ACT® attend two sessions per week over three to six months. For state assessments or classroom exams, the timeline may be shorter, depending on the student's starting point and goals.
After the diagnostic assessment, we'll have a clear picture of what your student needs and can recommend a session schedule that gives them the best chance of success.
No, both formats provide the same personalized learning plan, face-to-face instruction, and caring guidance from our tutors. Many families choose a combination of in-center and online sessions for added flexibility around busy schedules and exam timelines.
Yes! Mathnasium prepares high school students for the math sections of the SAT®, PSAT®, and ACT®.
Our specially trained tutors use proprietary test prep materials and personalized learning plans to build the content knowledge and problem-solving strategies students need to perform their best on test day. Whether your student is taking the exam for the first time or looking to improve their score, we tailor preparation to their current skill level and target goals.
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10543 4S Commons Dr Ste 175,
San Diego, CA 92127
| Call: | (858) 312-8888 |
| Text: | (858) 312-8888 |
| Email: | [email protected] |
Mon
3:00PM - 8:00PM
Tue
3:00PM - 8:00PM
Wed
3:00PM - 8:00PM
Thu
3:00PM - 8:00PM
Fri
3:00PM - 7:00PM
Sat
10:00AM - 2:00PM
Mon - Thu
3:00PM - 8:00PM
Fri
3:00PM - 7:00PM
Sat
10:00AM - 2:00PM
| Mon: | 3:00PM - 8:00PM |
| Tue: | 3:00PM - 8:00PM |
| Wed: | 3:00PM - 8:00PM |
| Thu: | 3:00PM - 8:00PM |
| Fri: | 3:00PM - 7:00PM |
| Sat: | 10:00AM - 2:00PM |
| Mon - Thu: | 3:00PM - 8:00PM |
| Fri: | 3:00PM - 7:00PM |
| Sat: | 10:00AM - 2:00PM |
Have questions? Contact us.