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M.D. Resident Physician|10+ Years Life & Health Sciences Tutor-Mentor
Ray R.

5.0 (157 ratings)

352 hours tutoring

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About Ray

Bio

Along with my Medical Doctorate and current Neurology residency at the University of Arizona, I bring over a decade of tutoring and mentorship experience in biology, chemistry, biochemistry, and the health sciences — with a particular focus on high school students tackling AP coursework and college-level pre-health students preparing for the next stage of their careers.

I actively support students preparing for careers, professions, and education in STEM and healthcare fields. Whether it's...

Along with my Medical Doctorate and current Neurology residency at the University of Arizona, I bring over a decade of tutoring and mentorship experience in biology, chemistry, biochemistry, and the health sciences — with a particular focus on high school students tackling AP coursework and college-level pre-health students preparing for the next stage of their careers.

I actively support students preparing for careers, professions, and education in STEM and healthcare fields. Whether it's cellular respiration, enzyme kinetics, molecular genetics, electrochemistry, or acid-base thermodynamics, I break high-yield material into visual, stepwise frameworks that make difficult concepts genuinely click and exam questions manageable under pressure.

My medical background allows me to support students well beyond the AP level. I regularly tutor pre-medical, post-bac, nursing, APRN / NP, PA, pharmacy, dentistry, optometry, PT, OT, and veterinary students in upper-division biology, chemistry, biochemistry, physiology, anatomy, microbiology, immunology, and pharmacology. For health science students, I connect foundational science directly to clinical reasoning — the same integration that defines medical education and separates students who truly understand the material from those who are simply memorizing it.

My teaching philosophy centers on conceptual mastery supported by visual learning, active recall, and high-yield prioritization — building durable scientific fluency that carries forward into every exam, program, and career that follows.

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Education

University of California - San Diego
Psychology-Biology
Loyola University Chicago
MD
University of Arizona - Neurology / Neuroscience
Other

Policies

  • Hourly Rate: $67
  • Rate details: Instant Book lessons canceled <24 hours of lesson time are subject to Wyzant's Instant Book T&C. After 15 minutes, sessions will be deemed as no-show cancellations absent of prior communication.
  • Lesson cancellation: 1 hours notice required

  • Background check passed on 12/11/2025

  • Your first lesson is backed by our Good Fit Guarantee

Schedule

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Approved Subjects

Algebra 1

Algebra 1

I bring a strong academic background and teaching experience in math at all levels from pre-algebra and Algebra 2 to trigonometry and geometry, developed through years of rigorous academic study and tutoring experience with high school and college-level students. I have guided learners across a variety of academic stages, from AP Calculus to advanced university-level calculus for engineering and pre-medical students. I commonly help students with topics like understanding derivatives and their applications, mastering integration techniques, solving differential equations, analyzing limits and continuity, and working through optimization problems. My teaching emphasizes building a strong conceptual foundation and developing problem-solving strategies to tackle complex math problems with confidence.
Algebra 2

Algebra 2

I bring a strong academic background and teaching experience in math at all levels from pre-algebra and Algebra 2 to trigonometry and geometry, developed through years of rigorous academic study and tutoring experience with high school and college-level students. I have guided learners across a variety of academic stages, from AP Calculus to advanced university-level calculus for engineering and pre-medical students. I commonly help students with topics like understanding derivatives and their applications, mastering integration techniques, solving differential equations, analyzing limits and continuity, and working through optimization problems. My teaching emphasizes building a strong conceptual foundation and developing problem-solving strategies to tackle complex math problems with confidence.
Anatomy

Anatomy

I bring a strong medical foundation in anatomy with a particular depth in neuroanatomy — the most conceptually demanding and clinically consequential branch of the field. My M.D. training and Neurology residency have given me an integrated command of neuroanatomical systems that goes well beyond surface-level structure identification: cranial nerve pathways and their clinical deficits, major ascending and descending tracts, cortical maps and localization, brainstem organization, basal ganglia circuitry, and the vascular territories whose compromise produces the stroke syndromes and focal deficits students are expected to reason through on exams. Rather than memorizing in isolation, I teach students to localize lesions, predict deficits, and work backward from clinical presentations — the same reasoning framework used in actual neurology practice. Beyond neuroanatomy, I support students across the full scope of gross and clinical anatomy, emphasizing structure-function relationships, vascular supply, musculoskeletal organization, and organ system architecture as they appear in lab practicals, shelf exams, and clinical scenarios. My teaching integrates anatomy with physiology, pathology, and clinical presentation so students reason through questions rather than recall isolated facts. I work fluently with atlases, imaging, cadaveric resources, and question-based materials, helping students translate diagrams into exam-relevant thinking. Whether you're in medicine, PA, nursing, dentistry, or allied health training, my goal is to build a durable anatomical framework — with neuroanatomy at its core — that supports clinical reasoning and long-term retention across your career.
Biochemistry

Biochemistry

As a recent medical school graduate (M.D.) current resident physician with a Bachelor's in Biology, I bring both a broad and deep understanding of biology, having studied the subject from the biochemical, molecular, and cellular level to entire organ systems. I've completed both graduate-level and upper-division university biochemistry courses as part of my bachelor's and doctoral training in molecular biochemistry and cell biology. I help students with a wide range of topics including enzyme kinetics, metabolic pathways, protein structure and function, bioenergetics, and molecular signaling. I’ve guided students in mastering core and advanced biochemistry concepts at the undergraduate, graduate, and pre-health levels. I commonly assist with topics such as glycolysis, the citric acid cycle, oxidative phosphorylation, electron transport chain dynamics, amino acid metabolism, lipid biosynthesis, nucleic acid structure and function, gene expression regulation, signal transduction pathways, and biomolecular interactions. I also incorporate foundational chemistry principles to reinforce key biochemistry concepts, including acid-base balance, chemical bonding in macromolecules, and thermodynamic considerations in biochemical reactions. Whether you're preparing for exams or trying to understand complex mechanisms, I focus on breaking down biochemistry into manageable, logical components that build confidence and long-term understanding.
Biology

Biology

As a resident physician M.D. graduate with a Bachelor's in Biology, I specialize in standardized exam preparation with a proven track record helping students excel in AP Biology. I've both taken and taught AP Biology, and my medical training provides deep expertise across all exam domains allowing me to teach IB and Regents Biology —from biochemistry and molecular genetics to physiology and evolution. With years of teaching experience supporting students from high school through graduate programs, I help master high-yield topics including cell biology (cell structure, membrane transport, cell cycle, mitosis, meiosis, cell signaling), metabolism (glycolysis, Krebs cycle, electron transport chain, photosynthesis, fermentation), molecular genetics (DNA replication, transcription, translation, gene regulation, mutations, biotechnology applications like PCR, gel electrophoresis, and recombinant DNA), evolution and ecology (natural selection, Hardy-Weinberg equilibrium, speciation, population dynamics, community interactions), and human physiology (nervous, endocrine, immune, circulatory, digestive, and respiratory systems). My approach emphasizes active problem-solving, free-response question strategy, data interpretation, and experimental design—the exact skills AP graders reward. Whether you're targeting a 5 or strengthening foundational understanding, I connect concepts to real-world applications in medicine and research to make complex material stick.
Calculus

Calculus

I bring a strong academic background and teaching experience in calculus, developed through years of rigorous academic study and tutoring experience with high school and college-level students. I have guided learners across a variety of academic stages, from AP Calculus to advanced university-level calculus for engineering and pre-medical students. I commonly help students with topics like understanding derivatives and their applications, mastering integration techniques, solving differential equations, analyzing limits and continuity, and working through optimization problems. My teaching emphasizes building a strong conceptual foundation and developing problem-solving strategies to tackle complex calculus problems with confidence.
Chemistry

Chemistry

With over a decade of tutoring experience in chemistry, I specialize in helping students excel in AP Chemistry, high school chemistry, and university-level General Chemistry (Gen Chem I & II). My expertise is grounded in rigorous pre-medical chemistry coursework, and for pre-health students, I integrate general chemistry with biochemistry fundamentals to build the foundation essential for healthcare careers. I help students master key chemistry topics including atomic structure and periodic trends, chemical bonding and molecular geometry (VSEPR theory, Lewis structures, hybridization, resonance), intermolecular forces, chemical nomenclature, stoichiometry and limiting reagents, gas laws (ideal gas law, partial pressures), thermodynamics (enthalpy, entropy, Gibbs free energy, Hess's Law, calorimetry), chemical kinetics (reaction rates, rate laws, mechanisms, activation energy), chemical equilibrium (equilibrium constants, Le Chatelier's principle, ICE tables), acid-base chemistry (pH, buffers, titrations), solubility equilibria (Ksp, precipitation reactions), redox reactions and electrochemistry (galvanic and electrolytic cells, Nernst equation), colligative properties, and nuclear chemistry. My teaching approach emphasizes conceptual understanding alongside problem-solving skills, helping students see the "why" behind formulas rather than memorizing equations. I break down complex problems step-by-step, identify common pitfalls, and build exam-ready proficiency in both multiple-choice and free-response formats. Whether preparing for AP/ACS exams or mastering course material, I provide clear explanations and targeted practice that improves grades and builds lasting confidence.
Genetics

Genetics

As a recent MD graduate with graduate training in genetics, molecular biology, and biochemistry, I bring both foundational and clinical expertise to genetics education. My coursework spans Mendelian and non-Mendelian inheritance, gene regulation, chromosomal abnormalities, population genetics, Hardy-Weinberg equilibrium, genetic drift and founder effects, epigenetics, mitochondrial inheritance, and molecular disease mechanisms, while my clinical training emphasized diagnostic genomics and hereditary syndromes. I help students master core concepts—Punnett squares, pedigree analysis, linkage mapping, mutation pathways (missense, nonsense, frameshift), and biotechnology applications (PCR, gel electrophoresis, DNA sequencing, gene editing, recombinant DNA technology)—and connect them to real-world applications in cancer genetics, pharmacogenomics, personalized medicine, and genetic counseling.
Geometry

Geometry

I bring a strong academic background and teaching experience in math at all levels from pre-algebra and Algebra 2 to trigonometry and geometry, developed through years of rigorous academic study and tutoring experience with high school and college-level students. I have guided learners across a variety of academic stages, from AP Calculus to advanced university-level calculus for engineering and pre-medical students. I commonly help students with topics like understanding derivatives and their applications, mastering integration techniques, solving differential equations, analyzing limits and continuity, and working through optimization problems. My teaching emphasizes building a strong conceptual foundation and developing problem-solving strategies to tackle complex math problems with confidence.
MCAT

MCAT

As a recent U.S. M.D. graduate, I bring a uniquely comprehensive background that spans every domain tested on the MCAT. My education in Cognitive Psychology and Biology, combined with graduate-level training in molecular biochemistry and cell biology in my medical doctorate from Loyola University Chicago, in addition to my tutoring experience teaching each of the subjects individually outside of the MCAT, allows me to teach the key MCAT subjects, including biochemistry, biology, physics, chemistry, psychology, and sociology—particularly in areas like enzyme kinetics, metabolic pathways, genetics, behavioral science, and experimental reasoning. I also specialize in data interpretation and critical analysis strategies, helping students break down complex passages and apply scientific concepts efficiently under timed conditions.—precisely the kind of interdisciplinary reasoning the MCAT is designed to test. This type of foundation enables me to teach not just individual subjects, but how they connect to form the larger framework of human function and medical thought. Over the past decade, I’ve helped pre-medical students translate complex science into confidence and precision. My approach combines content mastery with reasoning strategy—showing students how to identify patterns across passages, extract key details, and think through experimental data instead of memorizing isolated facts. I incorporate active learning techniques, spaced repetition, and visual frameworks that make relationships between systems and processes easier to retain long-term. I also guide students in using resources effectively, teaching them how to interpret question banks, break down AAMC passages, and review with purpose. Each student receives access to my curated set of high-yield PDFs, summary sheets, and resource links that reinforce efficiency and independence—tools many continue using beyond the MCAT itself. Beyond content and test prep, I also mentor students through medical school application strategy—from building strong study sc
Microbiology

Microbiology

Through my medical training, I developed a strong and clinically relevant foundation in microbiology, integrating a detailed understanding of pathogenic organisms with the immune system responses they provoke. My education covered bacterial, viral, fungal, and parasitic pathogens through both lecture-based instruction and case-based learning, giving me insight into how microbiological principles shape diagnostic reasoning, treatment planning, and infectious diseases / infections. I’ve applied this knowledge through years of tutoring students across nursing, physician assistant, pre-medical, and allied health programs—helping them translate microbiology from a memorization-heavy subject into one grounded in clinical relevance. I support students in mastering microbial classification, gram staining interpretation, bacterial morphology, replication, gene transfer, and antibiotic resistance. I emphasize understanding host–pathogen interactions, the role of normal flora, and the principles of innate and adaptive immunity. I also cover key clinical topics like viral replication cycles, fungal pathogenesis, parasitic life cycles, vaccine mechanisms, and sterilization protocols. For nursing and APRN students in particular, I integrate pharmacologic insight—highlighting antimicrobial classes, side effect profiles, and resistance mechanisms—to build strong clinical judgment.
Neuroscience

Neuroscience

As a Neurology resident, former Postdoctoral Research Fellow in Neurocognitive and Neurodegenerative Disorders, and U.S. M.D. with an undergraduate foundation in Psychobiology and Cognitive Neuroscience, neuroscience is both my professional expertise and deepest academic passion. My background spans undergraduate TA experience in Sensory Neuroscience, addiction neuroscience research using rodent models to study how alcohol dependence alters decision-making circuitry, and clinical training in neurophysiology and neuropathology — giving me an integrated perspective that runs from molecular mechanism to bedside application. I've supported students at every level, from undergraduates tackling neuroanatomy, synaptic transmission, and neurotransmitter systems for the first time, to medical and graduate students mastering clinical neurophysiology, neuropharmacology, cranial nerve pathways, and neurodegenerative disease. I specialize in breaking down complex systems — basal ganglia loops, cortical maps, autonomic pathways — into visual, stepwise frameworks that build genuine understanding rather than temporary memorization. Whether your goals are academic, clinical, or research-oriented, I bring a depth of neuroscience training that few tutors at any level can match.
Personal Statements

Personal Statements

My strongest area is personal statement strategy and revision—helping applicants turn real experiences into a clear, compelling narrative that sounds authentic, fits the prompt, and stands out to busy reviewers. As an M.D. and current postdoctoral neurocognitive research fellow, I'm trained to write with clarity, evidence, and structure at PI-level standards where wording, logic flow, and credibility are scrutinized closely. Over the past decade, I've mentored aspiring pre-health professionals and applicants to competitive science and healthcare graduate programs—including medical school, nursing, PA, pharmacy, public health, and biomedical research programs—helping them strengthen how they present their background, motivations, and professional trajectory in personal statements, secondary essays, and cover letters.I specialize in identifying the most salient moments in your story, organizing them into a coherent narrative arc, and ensuring your takeaway is memorable and professionally impressive without sounding generic or exaggerated. I coach applicants on what time-pressed admissions reviewers notice first: clarity, specificity, emotional maturity, demonstrated growth, and a compelling "why this path" that's grounded in concrete experiences rather than abstract claims. My approach combines big-picture structural guidance—theme selection, opening hooks, transition flow, conclusive impact—with meticulous line-level editing that sharpens tone, eliminates wordiness, and preserves your authentic voice while elevating professionalism.You'll receive actionable, specific feedback (what to change and why), clean polished drafts that read naturally, and a repeatable framework you can apply across multiple prompts, secondaries, program-specific "why us" essays, and professional cover letters. Whether you're starting from scratch, salvaging a weak draft, or fine-tuning a near-final version, I provide the strategic insight and editorial precision that transforms competent writing into standout application materials.
Pharmacology

Pharmacology

As a resident physician M.D. graduate with over a decade of tutoring experience, I bring comprehensive, clinically grounded pharmacology expertise with a proven track record helping students excel on high-stakes professional exams and board certifications. I work with students across graduate-level programs including nursing (MSN, APRN, FNP, CRNA, DNP), pharmacy (PharmD), PA studies, medical school, and undergraduate pharmacology courses. My instruction emphasizes molecular mechanisms of action, pharmacokinetics (ADME: absorption, distribution, metabolism, excretion), and pharmacodynamics (dose-response relationships, receptor theory, therapeutic index), alongside practical application in real-world clinical scenarios. Students master high-yield content including drug indications, contraindications, adverse effects, black box warnings, drug-drug interactions, and medication safety—core material that appears consistently on healthcare professional exams.I guide students through essential pharmacology organized by body system and drug class: cardiovascular pharmacology, antimicrobial therapy, CNS medications, endocrine therapies, anti-inflammatory drugs, chemotherapy and immunosuppressants, and respiratory medications. I place special emphasis on neuropharmacology and psychopharmacology, where understanding receptor targets (dopamine, serotonin, GABA, glutamate), side effect profiles, therapeutic drug monitoring, and patient-specific risks is essential.My approach integrates pharmacology with clinical reasoning, pathophysiology, and evidence-based medicine, helping students confidently tackle case-based scenarios and prescription decision-making. I teach memorization strategies for drug names (generic vs. brand), suffix patterns that identify drug classes, and high-yield mnemonics for easier retention. Whether preparing for exams, mastering a challenging course, or connecting pharmacology to clinical practice, I provide structured, efficient instruction focused on exam success and safe patient care.
Physics

Physics

I bring a strong academic foundation and over a decade of teaching experience in physics, with a focus on both high school AP and university-level coursework. Through my pre-medical training and extensive tutoring background, I’ve developed a clear and methodical approach to helping students understand the core principles that govern motion, energy, forces, electricity, and wave behavior. I regularly work with students on mastering the laws of motion, solving real-world dynamics problems, and applying concepts of energy conservation in both linear and rotational systems. My instruction also emphasizes understanding gravitational interactions, thermodynamics, and fluid dynamics, all within a unified conceptual framework. In the realm of electricity and magnetism, I guide students through topics like electric fields, potential, circuit behavior, resistance, and electromagnetism, with special attention to connecting abstract concepts to problem-solving techniques. When teaching waves and optics, I help students analyze interference, diffraction, refraction, sound, and light through both a physical and mathematical lens. My sessions prioritize building intuition, translating complex word problems into structured steps, and fostering confidence in applying formulas under exam conditions. Whether you're new to physics or preparing for a challenging university exam, I aim to make the subject both manageable and rewarding through clarity, repetition, and relevance.
Physiology

Physiology

My graduate-level M.D. training built a comprehensive, systems-integrated understanding of physiology and pathophysiology — from molecular signaling cascades to the coordinated function of entire organ systems under both normal and disease conditions. What separates my approach is the ability to bridge foundational mechanisms with clinical reasoning: not just explaining how the renin-angiotensin-aldosterone system regulates blood pressure, but why its dysregulation drives hypertension, heart failure, and renal disease simultaneously. I cover the full scope of human physiology — cardiovascular dynamics, renal function and acid-base balance, respiratory gas exchange, endocrine and hormonal regulation, neuromuscular physiology, gastrointestinal processes, immunology, and reproductive function — with consistent emphasis on the clinical implications that make each mechanism worth understanding. Whether a student is preparing for a physiology course exam, USMLE Step 1, the MCAT, or graduate-level health science coursework, I tailor the material to the level and goal at hand, using visual frameworks, stepwise breakdowns, and active recall to make dense, interconnected content genuinely retainable rather than temporarily memorized.
Psychology

Psychology

With a degree in Cognitive Psychology and Biology from UC San Diego, followed by advanced medical training and post-doctoral research in neurocognitive and behavioral neuroscience, I bring a strong interdisciplinary background to teaching psychology. My education bridges the biological and cognitive sciences, allowing me to connect psychological theory with underlying neural processes. I help students master core topics such as sensation and perception, classical and operant conditioning, cognitive development, memory formation, language, and motivation. As a former teaching assistant for Sensory Neuroscience and a longtime tutor, I focus on building conceptual understanding through real-world examples—linking brain function to behavior, learning, and emotional regulation. This approach helps students see psychology not as isolated facts, but as an integrated science grounded in human experience and brain function. Psychology remains one of my most rewarding subjects to teach, especially when preparing students for AP Psychology exams, the MCAT, or university-level coursework. I guide learners through high-yield areas such as neurotransmission, stress physiology, social and abnormal psychology, emotion and cognition, the stages of sleep, and research methodology—including experimental design, validity, and data interpretation. My sessions emphasize active learning, visual mapping of psychological systems, and application of foundational principles to complex scenarios. By combining insights from neuroscience and clinical medicine, I help students not only retain information but also develop a deeper understanding of human behavior, cognition, and the biological mechanisms that drive them.
Trigonometry

Trigonometry

I bring a strong academic background and teaching experience in math at all levels from pre-algebra and Algebra 2 to trigonometry and geometry, developed through years of rigorous academic study and tutoring experience with high school and college-level students. I have guided learners across a variety of academic stages, from AP Calculus to advanced university-level calculus for engineering and pre-medical students. I commonly help students with topics like understanding derivatives and their applications, mastering integration techniques, solving differential equations, analyzing limits and continuity, and working through optimization problems. My teaching emphasizes building a strong conceptual foundation and developing problem-solving strategies to tackle complex math problems with confidence.
USMLE

USMLE

As a U.S. M.D. and current Neurology resident physician, I bring both clinical insight and academic precision to USMLE preparation — having recently navigated the full exam sequence myself while simultaneously conducting active research, giving me a current, practical perspective on what high-yield preparation actually looks like under real conditions. I've mentored students across Step 1, Step 2 CK, NBME Shelf Exams, and clerkship rotations, helping them move beyond memorization toward the kind of integrated clinical reasoning the USMLE is actually designed to test. My strength lies in identifying the recurring conceptual themes woven across disciplines — the pathophysiologic mechanisms, pharmacologic principles, and clinical patterns that appear repeatedly in different forms — and teaching students to recognize and apply them rather than treat each topic in isolation. A core part of my approach is teaching students how to use their resources, not just what to study. I show students how to extract patterns from UWorld and AMBOSS question stems, convert wrong answers into durable learning, and use QBank performance data strategically to direct their review. I also share curated high-yield review sheets, focused strategy guides, and targeted materials I've developed and refined over years of tutoring and my own exam experience — resources students consistently tell me they continue using long after our sessions end, because they're built to foster independence rather than dependence. My ultimate goal is to help you think like a clinician under exam pressure: connecting foundational science to clinical presentation, reasoning through unfamiliar stems with confidence, and walking into every exam or rotation prepared rather than overwhelmed. Whether you're building from scratch or recalibrating after a setback, I offer structured, individualized support designed to make you not need me for long.
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Ratings and Reviews

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5.0 (157 ratings)
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Reviews

Knowledgeable and Patient

He is incredibly knowledgeable and patient. He takes the time to ensure you thoroughly understand the topic and goes the extra mile by bringing his own illustrations to enhance your understanding. His visual aids make complex concepts much clearer, and his teaching style is highly effective. I highly recommend him!

Padmapriya, 3 lessons with Ray

Knowledgeable

As a medical student I needed help with learning Anki and importing decks into Anki. Ray understood my confusion and guided me from beginning to the end. Now I feel confident about using Anki for repetitive recalls. Thanks to Ray !

Anhthu, 5 lessons with Ray

Adaptable and Knowledgeable Tutor

Ray was extremely helpful in preparing me for my molecular biotechnology and drug formulations class. These are postgrad classes that often include a lot of niche material that can be difficult to find a tutor for. Ray was not only deeply knowledgeable about nearly all the material and able to explain it clearly, but when something popped up he didn't know he would do his own research to familiarize himself with it so he could help. Aside from that he is very friendly and flexible with hours which is also nice.

N, 16 lessons with Ray

Excellent pharmacology tutor

I worked with Ray R. for multiple pharmacology sessions, and he was truly excellent. He is very knowledgeable, friendly, and incredibly effective at teaching difficult concepts in a way that was clear and easy to understand. He explained pharmacology in a way that helped me understand concepts my professor had not been able to make click for me. Ray was always very accommodating and consistently went above and beyond to make sure I felt comfortable, supported, and fully prepared. He made sure I had the right tools and strategies to study effectively, and that made a huge difference for me. I highly recommend him to anyone looking for a pharmacology tutor.

Capucine, 3 lessons with Ray

knowledgeable patient, kind.

Ray helped me gain a clear understanding of the clinical questions by explaining the concepts very well. I would highly recommend Ray to any student who needs help in the areas where he is well-versed, as noted on his profile.

Cecilia, 1 lesson with Ray

Quick and patient

I was struggling with an admittedly easy topic that just wasn’t clicking. I showed ray a couple problems I was struggling with and he helped break it down into understandable chunks. He pulled up a couple images that helped me understand the concept better and I felt confident in my understanding when the session ended. Super chill, patient, and a good teacher.

Kacey, 2 lessons with Ray