Colin Skinner

Colin S.

Albany, CA
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Lesson Details

Pre Calculus

Levels Taught:
Middle School, High School, College
Precalculus was one of my favorite math classes because it was where all of the algebra, geometry, and trigonometry that I learned up until that point came together and had to be used to solve problems. If you are planning on majoring in the sciences, engineering, economics, finance etc. then you will want to make sure that your understanding of the topics in precalculus are absolutely solid. Working with me, I will guide you to a deeper understanding of logarithmic and exponential functions, systems of equations, matrices, sequences and series, and more.
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Colin teaches



Colin passed a background check that includes a SSN verification, national criminal record check, and sex offender registry search. Learn More
Colin delivers an exceptional lesson experience and ranks in the top 15% of our teachers nationwide.
Teaches students:
and Ages 12+

Teaching since:
January 2014

Hello there! My name is Colin and I am a senior biomedical engineering major and undergraduate researcher at UC Berkeley. Additionally, I have been tutoring math, science, and essay writing on college campuses and online since 2014. Math and science are a significant part of my daily life, which is fortunate for me as I am very passionate about both.

As a tutor, my goal is not to impress you with how much I know. Rather, my goal is to impress you by showing you how easily math and science concepts can come to you when you are presented the material the way *you* need to see and hear it. It's my guarantee to you that I will always strive to communicate the concepts effectively, listen to your questions with patience, and work with your unique way of learning to help you truly understand the material. This takes time, and it takes work, but the rewards that come from it - high test scores, a strong GPA, and deep satisfaction of really mastering math and science concepts - are worth it many times over.

*Read a little further if you would like to know about my personal story on my journey to becoming a math and science tutor*

Admittedly, I didn't discover my passion for math and science until years after high school. In fact, I was seemingly terrible at both. This, I later found, was mainly due to poor communication and poor presentation of the concepts from my high school teachers. Almost eight years later, a genuine curiosity induced me to seek out YouTube videos on various math and science topics, and upon finding the right videos, where the material was presented effectively, it was actually fun and very satisfying to learn. In fact, I found that the concepts came rather easily to me. It was a night and day difference from my high school experience.

At this point, it was a glaring reality to me that people simply do not learn effectively when they aren't being presented the material in a very clear and interesting manner (for some strange reason, this is especially a problem with physics teachers/professors). For example, understanding *why* acceleration has units of meters per second squared makes those units much easier to memorize than simply knowing "it just does." Knowing *why* the x-coordinate of the vertex of a parabola is -b/2a, and why it's useful to even know how to find the vertex, makes it worlds easier to memorize than being told "it just is." Very few people in the world can learn effectively just by hearing dry, seemingly random information. On the contrary, people tend to learn and remember information they deem valuable. Since this discovery, it has been a goal of mine to help others learn and enjoy math and science the same way I do. I accomplish this by being a clear communicator, and teaching math and science concepts with excitement and demonstrating how this knowledge is valuable.

A drive to teach others is not the only good thing to come from my latent discovery of my passion for STEM. After teaching myself algebra through YouTube videos and various books, I enrolled in community college and placed in trigonometry. After completing my general education with a 4.0, I transferred to UC Berkeley into the biomedical engineering program and the rest, as they say, is history. Amazing things can happen when you are able to learn effectively!

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Math and Science Tutor
Jan 2014 - Present

For the last three years I have been tutoring various math and science subjects for high school and college students who found me through Craigslist.

Math Tutor
Jan 2014 - Dec 2015
San Diego Miramar College

I was a tutor in the Math Lab at Miramar College. Here, I tutored pre-algebra through multi-variable calculus.

Essay Writing Tutor
Aug 2014 - Dec 2014
San Diego Miramar College's The PLACe

At the PLACe I helped students in various English and humanities courses with their essay writing. Generally, students would ask me to read their drafts and I would advise them on grammar, syntax and structure.


B.S. in Biomedical Engineering
Aug 2015 - Dec 2017
University of California, Berkeley
A.A. in Mathematics, A.S. in Chemistry, A.S. in Pre-Engineering Studies
Jan 2013 - May 2015
San Diego Miramar College


Fluent / Native Proficiency
Limited Proficiency


Jack Kent Cooke Summer Internship Stipend
Jun 2017
The Jack Kent Cooke Foundation
Jack Kent Cooke Undergraduate Transfer Scholarship
May 2015
The Jack Kent Cooke Foundation
San Diego Mirmar College/Osher Foundation Scholarship
Apr 2014
Osher Foundation


Phi Theta Kappa
Mar 2014

The purpose of Phi Theta Kappa shall be to recognize and encourage scholarship among two-year college students. To achieve this purpose, Phi Theta Kappa shall provide opportunity for the development of leadership and service, for an intellectual climate for exchange of ideas and ideals, for lively fellowship for scholars, and for stimulation of interest in continuing academic excellence.

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Photos & Videos

Algebra Topic  - How to complete the square.
Pre-Algebra Topic - Exponent Properties
Algebra Topic - How to derive the quadratic equation using completing the square.
Physics Topic - Deriving the kinematics equations for 2D projectile motion on Earth.
Being presented with a small gift after winning Jack Kent Cooke scholarship.

Photo by Colin S.
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22 Reviews

Write a Review
Leah Nov 22, 2017
Calculus · Online

Colin is great! He helped my daughter with Calculus and she said she appreciated that he always took the time to make sure she thoroughly understood a problem she was working on, before they moved on to the next one. Great teacher!

Joe Baeza Nov 18, 2017
Algebra · Online

We are very fortunate to have found Colin to tutor our son, who is 14, in algebra. He was struggling in his class and with his confidence in math, but after his first few sessions with Colin his quiz and test scores in algebra came up. Not only that, but he even teaches his classmates the techniques he has learned with Colin. Very impressed with our son’s progress. Thank you Colin!

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Greg Nov 11, 2017
Calculus · Online

He was very helpful.

Shyam Oct 18, 2017
Calculus · Online

Colin is a methodical and excellent teacher for my son who needed help with multi variable calculus. He’ll be our go to teacher for now and the future. Thank you Colin.

Marie Oct 7, 2017
Pre Algebra · Online

Colin is amazing! I'm so happy we have been fortunate enough to find him. He is incredibly patient, easy going and very knowledgeable. He has a way of teaching that explains in detail the 'why and how to' that enables my daughter to better understand and move forward with the next stage. She loves math and looks forward to her lessons with Colin. An absolute 5 star teacher. Thank you Colin.

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Jiyah Oct 2, 2017
Algebra 1 · Online

Good teaching style

Lauren Oct 1, 2017
Pre Algebra · Online

My son (12) genuinely enjoys his lessons with Colin, and he's greatly benefitted from his patient and comprehensive teaching style. He's becoming more confident in his math skills. Thanks, Colin!

Jayden Sep 9, 2017
Algebra · Online

He's an Algebra superstar! Patient and great tutor.

Bradley Aug 31, 2017
Calculus · In home

Colin has a great grasp of the material. He really helped me through such a tough subject!

Leigh B. Aug 19, 2017
Basic Math · Online

Coln was really wonderful to work with. He explained everything so well and in a relatable way to me I look forward to the next lesson

Corey Aug 15, 2017
AP Calculus · Online

Colin has been the best tutor! He was a huge help in this past semester, as my professor was not good at teaching. Many of the concepts in pre-cal are very confusing and new; I wouldn't have been able to pass the class with an A without Colin's help!!

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Luke D. Aug 13, 2017
Pre Algebra · Online

Colin is amazing!!! Glad we found him for summer help. Really took his time to make sure my son understood the concept and not just a quick do and be done. He s got a nice teaching style. Ty!

Lynn Aug 11, 2017
Calculus · In home

Colin was flexible with my schedule and was readily available if I had additional questions. He broke subject matter down for me and made sure that I had a good understanding of the topic before moving forward.

Most importantly, Colin never made me feel incapable when it came to doing the work.

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Lili Aug 8, 2017
Chemistry · Online

Colin has such a strong passion for science and it's easily seen in his teaching style. He takes time to make sure that I understand the material before moving into the next section. He is very flexible and works around my schedule, especially if I have a final coming up! He has helped me get all A's in my general chemistry courses and I recommend him to anyone who needs some extra help to get higher grades!

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Jack Aug 8, 2017
Calculus · Online

I'm happy to say I found Colin for help with my calculus 1 class. I was doing okay from the beginning, but I felt like I was lacking the depth of understanding of some core algebra concepts and wanted to get solid on them before the class got more challenging (integration), as I was striving for an A in the class. Colin was a wizard at honing in on my weak points and he did an excellent job of really breaking things down and honestly, presenting concepts in more tangible ways than did any of my algebra teachers. I used the principles I learned from my sessions with Colin to get me through some challenging exam problems, and I'm proud to say that I ended up with a 97% in the class overall!

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Lynn Aug 8, 2017
Calculus · In home

Colin was flexible with my schedule and was readily available if I had additional questions. He broke subject matter down for me and made sure that I had a good understanding of the topic before moving forward.

Most importantly, colin never made me feel incapable when it came to doing the work.

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Josh Aug 8, 2017
Math · Online

Colin tutored me in business math and he did such great job!!! He explained it so well for me to understand and he knew the material. Very professional.

Noah Aug 3, 2017
Calculus · Online

I was falling behind in math and Collin really helped me understand some harder concepts that I was missing. He goes the extra mile to help you succeed

Nydia Daleo Apr 14, 2016
Algebra · In home

My 3 daughters looked forward to Tutoring Nights with Colin!

I have 3 girls in High school (10th, 10th, and 9th) . they had been struggling in math since I can remember. I didn't think I could afford tutoring. They each had an 'F' in math.

I found Colin, and what a blessing! In just THREE short weeks Colin had my girls understanding HIS lessons, their CLASSROOM lessons and PASSING their exams! They brought their grades up too!

The best thing I can compare his tutoring to is: an adult teaching a kid to ride a bike...
He didn't expect them to just ride a bike. he took the proper steps and taught my girls about the bike parts, the way the bike functions, how they all work together, how to properly sit and pedal, and he even held them up until they understood it completely and eventually were able to ride the bike on their own.

Thank you Colin! for putting my girls back on track with math!

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Grace Mar 30, 2016
Algebra 1 · Online

He is very good at explaining and making math simple. He's helping me take algebra and geometry at the same time. My grades have defiantly improved! I really enjoy these lessons and help. I highly recommend him for a tutor.

Ryan Mar 27, 2016
Chemistry · Online

Colin provided me with tutoring for chemistry, via FaceTime. Over the semester he was very flexible with my off-peak time schedules, and was EXTREMELY patient to my questions. Using Colin for tutoring helped my grades and provided an overall great value. Thanks Colin!

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Ryan Mar 27, 2016
Chemistry · Online

Colin provided me with tutoring for chemistry, via FaceTime. Over the semester he was very flexible with my off-peak time schedules, and was EXTREMELY patient to my questions. Using Colin for tutoring helped my grades and provided an overall great value. Thanks Colin!

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