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 After having tried a few tutors in earlier years I just about gave up on them. A friend referred me to John and finally here was a tutor who cared about how I learned and about helping me achieve my goals. John helped me in grade 11, 12 and now 1st year with math and sciences at U of T. Without his caring guidance Life Sciences would be unbearable at university. His knowledge and integrity are remarkable. Thanks John. 
- Sandie (Bishop Strachan School; University of Toronto)
After experiencing many tutors throughout high school, it took me until Grade 12 to find one that cannot be replaced. John Gatsis has a true passion for the one on one tutor experience and does exceptionally well in helping one better understand the difficulties of any math or science. Not only does John make it easier to understand the work, but he makes it fun as well. I looked forward to meeting with John weekly, as it was like spending time with my buddy, who at the same time made Calculus and Vectors a breeze for me. I cannot stress enough how helpful John was for me in getting my grades up for University and my only regret was not starting with him at an earlier age.
- Mike (St. Michael’s College; University of Western Ontario)
Math is a tricky one. No matter how natural you are at it, there is still so much more to learn. John is incredible at filling in those gaps. He made sure we actually understood the material and worked with us beyond the material of the classroom rather than simply having us memorizing. John's also got an easygoing style that makes math more enjoyable. We recommend him highly!
- Laura & Emma (Havergal College)
John is one of those people that you do not meet every day. He came into my house with the utmost respect and modesty. We quickly became friends. I was in a situation at the beginning of my grade 12 year where I had no sense of direction, procrastinated, and was immature. During first semester, John tutored me in advanced functions and data management. When we had time at the end of a session, we would discuss what I should do with my life. John taught me the difference between short-term goals and long-term goals and what you have to do to succeed. He made me want to strive for excellence and perfection. It really boosted my confidence and determination to get the highest marks on tests and exams. I was able to get 90%-100% grades when I put my mind to it. It soon became apparent that John's purpose was really to set me on the right path and direction. His teachings and examples are flawless and he makes the questions so much simpler with his methods. By second semester I had the choice of taking physics as an elective but was unsure about what to do. I spoke to John about it and he encouraged me to take the course even though it was going to be challenging. He told me that it would make me well-rounded in mathematics. That semester John was tutoring me in calculus and vectors and physics. It became useful to take them both because they were interrelated. There isn't one word that defines John. I think he is compassionate, dedicated, articulate, patient, inspirational, and accommodating. I was very fortunate to be tutored by John for my Grade 12 subjects (calculus and vectors, advanced functions, data management, and physics). John was more than just my tutor, he became my mentor. My marks improved into the 90's and above. I owe so much to John and anybody who will be tutored by him will succeed.
- Brandon (Metropolitan Preparatory Academy; Brock University)
John Gatsis was excellent in helping me not only to achieve a passing mark, but exceeding even my own goals in math in high school. He helped me in Grade 11 University Math, Grade 11 Chemistry and Grade 12 Data Management. I can honestly say that I wouldn't be in the program I am in today if it weren't for John helping me to succeed in high school and boosting my overall average. I am in George Brown College in the 4 year degree program in Construction Management and have to take Technical Mathematics this year. It is very similar to Grade 11 Advanced Functions, and I am doing well in it as I had a great teacher to instil the foundation of math in me years ago. John is patient and excellent in explaining the most complex of math problems. He shows you how to tackle hard equations and develop skills to adapt to any situation. He is a great teacher and I recommend if you ever need help in math and science don't wait to call John!
- Hayden (East York Collegiate Institute; George Brown College)
I believe John to be a fantastic tutor. He has helped me grasp concepts that I have had difficulty learning from any other teacher. John not only explains and demonstrates the math he also lets me participate actively. He is the best tutor I have ever had.
- Aaron (Danforth Collegiate and Technical Institute)
John was a great tutor. I really enjoyed his methods of teaching because he broke down the material and explained parts I was having trouble with. One thing I really liked was that he made sure I knew the material we were working on. We would do small tests to make sure I was on the right track and if I didn't score 90+ we did it again. I had John help me with math for my last three months of school and in the end I went from a 37 to a 57. John was a great teacher and I would suggest him to anyone looking for extra help.
- Ben (Riverdale Collegiate Institute)
John has been an absolute miracle worker with me. He helped me
through a university-level linear algebra class that I desperately
needed in order to graduate. When we started, I really didn't think I
would be able to learn the entire course in six weeks, yet going into
the exam, I felt confident that I knew the course material and was
prepared for all possible question types. John breaks down dense and
abstract material into concrete, simply stated examples and begins
with the building blocks, methodically working forward. His passion
for teaching is overwhelmingly obvious; he prepares for your session
ahead of time, is quick to follow up on unanswered questions, and most
importantly, he's extremely patient and genuinely interested in your
success. If one approach isn't working, he's got plenty more up his
sleeve. I found he was quick to recognize my learning style and adapt
his teaching so we maximized use of time and effort.
What was so great about John, on top of his excellent teaching
skills, was that he is extremely personable. I sincerely looked
forward to my sessions with him as I not only enjoyed his company, but
always left feeling I was making substantial progress and becoming
more confident in my ability to master math.
This year, I begin my graduate studies at the University of Toronto
and I truly have John to thank for that. I can't thank him enough for
his hard work and dedication to my cause. I can surely say I will be
quick to recommend John to anyone needing a hand in math or science
and guarantee you will not be disappointed.
Thanks again John, a million times over.
- Nadine (University of Toronto)
This past summer I enrolled in a university-level Calculus course not having done Calculus in about 4 years. Not knowing what exactly I was getting myself into I began looking over the course material and quickly realized that I was in far over my head. Furthermore, the university I had chosen to take the course at provided no form of extra help or assistance. In a panic, I decided that I could not do this, that I would fail, and that I would now have to spend an extra semester at my own university to take a math course there. Luckily, logic took over and I decided to search for a tutor, with the hopes to be able to at least pass the course. It was then when I stumbled across John Gatsis' website. Immediately impressed by the stellar testimonials I decided to do some background researching, whereby I found out that John was a PhD candidate and has had numerous years of teaching and tutoring experience. Ding ding ding! I sent John a brief email asking only if he still tutored for University courses within a few hours he had responded and from there we set up our first session.
John Gatsis knows mathematics inside and out. By taking five minutes at the start of every session he was able to dissect the textbook and hone in on the most vital concepts. From there he would bypass the textbook mumbo-jumbo and teach me the material using his method - and his method was amazing. Before I knew it we were completing a section in a single 2-hour session, and most importantly, I actually understood the material. John created his own set of notes for each section, and provided me with the skills and knowledge to tackle any problem that was thrown my way. John is not only a tutor, but also a teacher and a mentor. He genuinely cares about each of his students and truly inspires them to do their best. He is a dedicated teacher, punctual, modest, and uniquely tailors each session to fit the student's learning style.
John not only helped me complete a university level calculus course, he and I finished the course within 6 weeks! I was left with a 1.5" binder chockfull of John's "lectures" and meticulous handwritten notes, myriads of examples and "Gatsis Methods" for tackling any problem.
Most importantly, John gave me the confidence to do Calculus. He believed that I could do it even when I didn't believe I could. With his support and never-ending encouragement, I OWNED that course. If it weren't for John, I would be spending an extra semester at university, kicking myself in the shins.
John helped me to achieve a 98% on my final exam, and finish the course with an A+. I thought that it would be impossible for someone who hasn't done math in 4 years to ever do this...but John proved me wrong! I can never begin to thank John enough, as he was not only a "tutor", but also a friend, and an inspiration. I owe my success in Calculus to John entirely.
- Allie (Dalhousie University)
John Gatsis has been my math tutor and mentor for the past three years. He is friendly, professional and always prepared. He has the ability to teach at different levels and age groups by making you feel comfortable and at ease. John communicates clearly while motivating you to get to the next level. His teaching style adapts to different personalities, age groups and learning speeds because he is patient. Mostly John has helped me greatly improve my marks. Therefore, I highly recommend John for this type of profession.
- Peter (St. Michael’s College; University of Toronto)
John tutored me in calculus during my grade 12 year and in my first year of university. Thanks to him I managed to get A's in both. He helped a lot and simplified everything in a way my teachers couldn’t. He was very approachable and explained concepts well! Thank you John for getting me through Math!
-Philip (Leaside High School; York University)
My experience with John was awesome! He helped me so much with math and now I am more successful than I imagined possible! Thanks so much John!
-Deanna (Sir John A. MacDonald Collegiate)
When I decided to go back to school and pursue a master's degree and needed to take the GRE (Graduate Record Exam), I was really rusty on my math skills. I met John once a week for the next two months and he helped me increase my score by over 200 points. John taught me how to think logically and quickly without the assistance of a calculator. He broke down problems and formulas, which at the time seemed impossible, to basic fundamental equations. John helped me find my confidence back. Thanks John for everything! You’re the best J.
- Sacha (McGill University; New School, New York City)
For further details or to arrange a session, please contact me at: gatsis88@gmail.com.
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