Our Experts
Meet Our Experts
PhD-level and expert STEM and English educators dedicated to rigorous, student-centered learning.
STEM experts
Mathematics, Physics, Earth Science, Biology, and Statistics.

Evgeniy Kulakov
Ph.D. in Geology · EVK Expert
Areas of expertise
Student levels
Evgeniy is a geoscientist and educator with extensive experience teaching Earth Science, geology, mathematics, statistics, and other quantitative subjects at the college level. He holds a Ph.D. in Geology from Michigan Technological University. Evgeniy has been teaching courses ranging from Physical Geology and Mineralogy to Structural Geology and Statistics, including applied statistics, data analysis, and statistical reasoning for STEM students. Evgeniy emphasizes clear explanations, practical problem-solving, and helping students truly understand the concepts behind the material. At EVK, he works with Grades 11–12 and college students in Earth Science, Mathematics, and Statistics.

Justin Ruffa
Ph.D. in Aerospace Engineering · EVK Expert
Areas of expertise
Student levels
Justin is an aerospace engineer, retired Air Force officer, and educator with extensive experience teaching mathematics, engineering, and physics at the high school and college levels. He holds a Ph.D. in Aerospace Engineering from the University of Michigan and has taught courses ranging from Algebra II and AP Calculus AB to Multivariable Calculus, Differential Equations, and Linear Algebra. Justin focuses on helping students build a deeper understanding of fundamental concepts through intuitive yet rigorous explanations paired with practical problem-solving skills development and real-world applications. At EVK, he works with Grades 11–12 and college students in Physics and Mathematics.

Jacob Cunha
M.Sc. in Biology · EVK Expert
Areas of expertise
Student levels
Jacob is a young academic with a background consisting of Physiology, Exercise Science, and Life Science. He holds a Master's Degree and is on his way to completing PhD coursework. Jacob has taught various exercise science and physiology lab courses at the collegiate level. Lastly, Jacob has experience being a middle school science teacher and has worked in general education within various states. At EVK, he works with grades 9–12 and college students in Biology.

Rijan Karkee
Ph.D. in Physics · EVK Expert
Areas of expertise
Student levels
Rijan is a theoretical and experimental materials scientist, energy and policy analyst, and educator. He previously served as a postdoctoral researcher at Los Alamos National Laboratory and currently works as an Engineer Advisor at the New Mexico Public Regulation Commission. He has extensive college-level teaching experience in physics, mathematics, and computational modeling. Dr. Karkee earned his Ph.D. in Physics from the University of California, Merced. His teaching approach emphasizes clear explanations, practical problem-solving, active learning, and helping students develop a genuine understanding of the concepts behind the material.

Caroline Ackley
Ph.D. in Biology · EVK Expert
Areas of expertise
Student levels
Caroline is a neuroscientist with over 10 years of teaching, mentoring, and tutoring experience. She received her PhD in Molecular, Cellular, and Developmental Biology from UC Santa Barbara in 2022. She has experience working with students of all ages, but specializes in teaching high school and undergraduate students in the life sciences. Having taught over 20 courses during her graduate training, she has crafted a Teaching Philosophy built on a neuroscientific understanding of how the brain learns and retains new concepts, as well as an emphasis on fostering intrinsic motivation and confidence in her students. Her specialties are chemistry, biology, genetics, neuroscience, and psychology.

Reid Gordon
Ph.D. in Biology · EVK Expert
Areas of expertise
Student levels
Reid earned his Ph.D. in Molecular Biology from the University of California, Santa Barbara and has published in the fields of biophysics and biochemistry. His clear and patient teaching approach focuses on building student confidence and curiosity. Reid has deep experience teaching biology, biochemistry and chemistry subjects at the undergraduate level in courses such as Structure and Function of Macromolecules as well as Bioenergetics, Enzymology and Metabolism. He also has over 140 hours of experience tutoring high school biology and chemistry subjects. At EVK, he tutors chemistry and biology at grades 11, 12 and undergraduate levels.

Eric Brown
Areas of expertise
Student levels
Eric is a professional tutor with 23 years of experience tutoring secondary and college mathematics, as well as standardized testing, and has expertise in both areas. He loves to tutor math and see students gain the knowledge necessary to succeed in their math courses. Eric emphasizes mathematical theory and, in tutoring, exhibits precision, clarity, and, most of all, patience. Frequent repetition and further explanation of mathematical theorems and definitions are central to his approach.
English tutors
College writing, SAT/ACT English, and ESL support.
English experts coming soon
We are onboarding our English tutoring team now. Profiles will be published here shortly.

