Our Tutors

Fusion Math tutors are here to help your child achieve their goals in math and science, whether it is to shore up foundations, become a master problem solver, or score at the top of math competitions of standardized tests. We believe that all students can become successful in their studies and that confidence comes with competence. All or our tutors must pass a rigorous screening process to demonstrate mastery of their core competency.

Please contact us answer any questions, set up an informational meeting, or to simply get started! You can also txt us at: 206-729-6284 (MATH)

Uplift Writing, our sister company, offers English, Writing, Creative Writing, College and Private School Admissions Support, and other classes in the Verbal Arts as well as Prep for the Verbal Sections of the SAT, ACT, ISEE, and SSAT tests. Please click the Uplift Writing Contact Form to get in touch.

Mark Batho

Fusion Math Founder / Owner.

M.Eng. Civil and Environmental Engineering, MIT ‘99

B.Sc. Civil and Environmental Engineering, Cum Laude, Seattle University ‘96

UW Civil Engineering Lecturer 2004-2010. Current CMAC U12 Coach and Board Member. In addition to skiing, Mark enjoys mountain biking and hiking with his family.

Mark founded Fusion Math with his wife Julianna in 2011. He tutors the SAT, SAT Subject Tests, ACT, GRE, SSAT, ISEE, all levels of Middle and High School Mathematics including Calculus and Physics. Mark lives in the Bryant neighborhood of Seattle with his wife Julianna and kids.

Mark’s availability is limited. Please CONTACT US to inquire.

Henry Brinkerhoff: In-Person, Online

B.S. Physics, University of Pittsburgh

Ph.D. Physics, University of Washington, 2019

Henry’s subjects include physics and math from elementary to graduate levels, as well as computer science, statistics, chemistry, and biology from elementary to undergraduate levels. He also offers preparation for standardized tests including AP Exams, ACT, SAT, SAT2 and Subject Tests, as well as GRE. He has extensive experience working with students with developmental or learning disabilities.

During his PhD in physics at UW, he worked on a new technique using biological nanopores and precision electronics to observe individual molecules. This technology can be used to analyze and sequence DNA, understand protein function, and make extremely precise measurements of tiny molecular movements. Henry uses physics, math, computer science, chemistry and biology on a daily basis, and will be more than happy to talk your ears off about real-world applications of the concepts you’re learning!

Please CONTACT US to arrange a session with Henry.

Isaac Benioff: In-Person, Online

B.A. Mathematics, Williams College, 2018

After graduating college in 2018, Isaac moved to Seattle to work as a software developer. But after three years, he left his tech job so that he could pursue his true passion: teaching. He now tutors math from the middle school to undergraduate level, as well as introductory computer science and Test Prep such as the SAT, ACT, SSAT, ISEE. He prioritizes conceptual understanding, creativity, and student-led exploration. He has a deep love and appreciation for mathematics, and it's his goal to help students find their own joy in the subject.

He is experienced in tutoring young children as well as university students. He has worked as a math teacher at Generation Teach, a summer academy for middle schoolers in the Denver area. And while at Williams, he also worked for the college's peer tutoring program, offering assistance to fellow mathematics students who needed help in their upper level algebra and analysis courses.

Isaac got an 800 on his SAT Math, and he is also a published researcher, having coauthored a paper with one of his mathematics professors in The Journal for Knot Theory and Its Ramifications.

In his free time, Isaac enjoys skateboarding, snowboarding, surfing, biking, playing music, and cooking with friends.

Please CONTACT US to arrange a session with Isaac.

Christian Williams: Online

B.S. Computer Science and Engineering, MIT, anticipated 2022

Christian is available to tutor mathematics, up to and including Calculus. He also tutors Calculus-based Physics, Chemistry, and the SAT (including the Reading and Writing sections). He scored a 1550 on his SAT and an 800 on the Math II Subject test.

Christian has extensive tutoring experience - at MIT, he ran his own class tutoring the SAT through a program called the MIT Academic Teaching Initiative. He also has experience in tutoring one-on-one, which he gained through an independent tutoring business he started in high school! He has a passion for teaching, and wants to share his love for learning with his students.

He is currently pursuing an undergraduate degree in Computer Science and Engineering at the Massachusetts Institute of Technology. In his free time, he enjoys playing piano and listening to new music.

Please CONTACT US to arrange a session with Christian.

Christopher Craig: Online

M.S. Applied Mathematics - University of Colorado Boulder

B.S. Applied Mathematics - Shippensburg University of Pennsylvania

Chris is available to tutor math subjects ranging from pre-algebra through AP calculus and statistics. He also offers preparation for the math portions of standardized tests such as the ACT, SAT, SSAT, and ISEE tests. He has two years of tutoring experience at Shippensburg University of Pennsylvania where he tutored courses such as Calc 1, Calc 2, Statistics, Linear Algebra, and Mandarin Chinese. As a tutor, Chris strives to make math interesting for students as well as reaching that “a-ha” moment, where a topic finally clicks for them.

The focus of Chris’s masters' degree is in statistics and data science, and he is currently working on various projects utilizing statistical and machine learning. In his free time, Chris enjoys reading, cooking and physical activities including climbing, hiking, and basketball.

Caleb Penner: Online

M.S. Applied Mathematics - University of Colorado Boulder

B.S. Applied Mathematics - University of Colorado Boulder

B.S. Engineering Physics - University of Colorado Boulder

Caleb simply loves teaching, tutoring and coaching. He was a tennis coach throughout high school, working with all ages and skill levels. In college Caleb pursued math because it gives a toolbox of skills to solve problems analytically. His pursuit of physics came with wanting to understand how the world works. He continued to hone his teaching skills while being a TA for the applied math department teaching Differential Equations and Linear Algebra. 

His goal with tutoring/teaching is always to acknowledge the difficulty of the subject and work through it with the student and make sure there is understanding behind each answer. Math can be quite hard, but Caleb is confident he can find a way to explain it for every person. Caleb tutors all levels of Math and Physics as well as Test Prep such as SAT, ACT, SSAT, and ISEE.

Outside of academia, sport has been a big part of Caleb’s life. He was a captain on the track and field team at CU Boulder, where he was a thrower competing in discus, hammer and weight throw. Tennis and soccer were his main sports prior to college. For fun, he loves rap music and getting a chance to go outside and hike/camp/backpack or play pickup games with friends.

Please CONTACT US to arrange a session with Caleb.

Alex Ziemann: In-Person, Online

B.S. Mechanical Engineering, Cal Poly, San Luis Obispo, 2019
M.S. Mechanical Engineering, University of Washington, 2022

Alex is available to tutor math at elementary through undergrad levels, up to and including Calculus and Linear Analysis. He also tutors middle and high school-level physics, introductory courses to programming, and can offer test preparation for the ACT, SAT, SSAT, ISEE, GRE, AP Exams, and more.


Alex started tutoring at just 16 years old and has experience tutoring middle and high school-level students, both individually and in groups. He is passionate about math and loves to share his enthusiasm with his clients. For students who are eager to go above and beyond their class curricula, Alex offers guidance, knowledge, and problem-solving techniques. For students who want to excel in their class or understand course material better, he can provide greater comprehension and clarity. But Alex holds a special place in his heart for those who are struggling to understand course material or why they should learn it. For those students, he can provide positive support, skills to succeed in their classes, and practical examples as to why the subject is important.


Alex is currently working on his Master’s degree in mechanical engineering at UW and is scheduled to graduate in 2022. In his free time, he enjoys reading, biking, exploring new places, and playing soccer.

Please CONTACT US to arrange a session with Alex.

Amanda Linder: In-Person, Online

B.Sc. UW Mechanical Engineering, University of Washington, 2022

Amanda is available to tutor Math up through Calculus as well as Physics and Chemistry. She scored 800 on her SAT Math and 720 English and is also available to tutor ACT, SAT, ISEE, SSAT Math.

She has several years previous tutoring experience and has enjoyed working with kids since she was old enough to babysit. She is always excited to share her love of math and science with others while also improving the confidence the students

Amanda is currently pursuing an undergraduate degree in mechanical engineering at UW and spends any free time she has reading and searching for the best coffee/ ice cream shop in Seattle.

Please CONTACT US to arrange a session with Amanda.

Dan Messenger: Online

B.S. Math, B.A. Physics, University of Puget Sound;
M.S. Applied Math, Simon Fraser University;
Ph.D. Applied Math (In Progress), UC Boulder, anticipa
ted 2022

Dan tutors math, physics and statistics at elementary through undergraduate levels. He is especially fond of making math approachable, especially for those who are self-diagnosed as bad at math.

Before graduate school, Dan enjoyed tutoring at Fusion Math for students of all ages. As a graduate teaching assistant, Dan has led recitations, group tutoring and more in the calculus series, ordinary differential equation, numerical analysis, and set theory. Currently Dan is a Lead TA and mentor for first-year graduate teaching assistants in the Applied Math department at CU Boulder.

When not teaching, Dan spends time doing research in mathematical biology and data-driven mathematical modeling for his Ph.D. When not doing math, Dan is likely to be found somewhere in the Colorado Rockies biking, hiking, snowboarding, or playing music.

Please CONTACT US to arrange a session with Dan.

Erik Anson: In-Person, Online

A.B. Physics, Princeton University

M.S. Physics, University of Washington

Erik tutors math up through multivariable calculus and linear algebra, physics up to graduate level, High School Chemistry, and introductory to intermediate computer science. He is also available for standardized test prep (such as SAT, GRE, and various subject tests).

After college, Erik spent a year teaching AP Physics, AP Calculus, and AP Chemistry at the Philips Academy in Andover, MA. He followed this with six years as a graduate student in the UW Physics Department, where his research focus was cosmology and dark matter structure formation. Erik has wide-ranging experience teaching and tutoring a variety of topics within math and physics, and it makes his day when students ask questions that go beyond the required material. He loves math and physics... and wants you to, too!

Please CONTACT US to arrange a session with Erik.

Kyle Humphrey: In-Person, Online

M.S. Biostatistics, University of Arizona
B.S. Chemical & Biomolecular Engineering, B.S. Biochemistry, and B.S. Chemistry, University of Nebraska-Lincoln

After riding his bicycle over 4,000 miles across the Western US and spending a season as a wilderness ranger in Northern Alaska, Kyle landed in Seattle in 2012.

Kyle instructs all levels of math from pre-algebra through calculus. He also specializes in Statistics, Chemistry, Physics, and Biology, and Math for the SAT, ACT (incl. science), SSAT, ISEE

Kyle’s style is flexible, presenting material from a variety of different angles based on what works best for the student. He strives to keep learning experiences informal and fun.

Please CONTACT US to arrange a session with Kyle.

Maddie Romansic: Online

B.A. Mathematics, University of Washington

Maddie specializes in middle and high school math and geometry through pre-calculus, including UW MATH 120 (also called UW PreCalculus at the High School Level).

Maddie really enjoys working with kids and strives to be a creative and empathetic tutor that takes a methodical approach and treats no concepts as "obvious."

Please CONTACT US to arrange a session with Maddie.

Sam Kowash: In-Person, Online

Masters Physics, University of Washington, 2020

Sam tutors math and physics from the elementary to graduate level, as well as statistics, HS chemistry, intro CS, and standardized test prep, including SAT, ACT, ISEE, and SSAT. He has been a teaching assistant at the University of Washington for the past three years, working closely with experienced educators and developing a patient, inquiry-led approach to teaching. He is always excited to help others find new perspectives and connections, and appreciates the opportunities teaching gives him to find new angles on old material.

Sam has a master's degree in physics from UW, where he focused on theoretical particle physics. Before Seattle, Sam studied in Corvallis, OR at Oregon State Unviersity, where he earned bachelor's degrees in physics and math, including a research thesis on the behavior of gamma-ray bursts originating in other galaxies.

Outside of physics, Sam enjoys reading, playing guitar, and playing board games with friends.

Please CONTACT US to arrange a session with Sam.