"Professor Mark Yin is unbelievably good. He is a dedicated teacher, he emphasizes the fundamentals, he gives the student his undivided attention, he makes sure they feel good about themselves. He is warm, friendly, attentive. He is easy to talk to and focuses on making the lesson engaging and fun."

"Dr. Yin has been working with my son now for 3 years. He came highly recommended by a friend, whose children had greatly benefited from his teaching, and we were not disappointed. Dr. Yin is reliable, dedicated, patient, and incredibly gifted as a mathematician. His knowledege extends to other subjects as well, and he has also helped my son extensively in physics and chemistry."

"I am glad to recommend Dr. Mark Yin of Greenwich Math and Physics without any reservation for the top quality tutoring. Dr. Mark Yin is the best tutor I have ever had."

"Professor Yin has a rich background in teaching and experience that certify him as an excellent tutor. While working with Melissa, Professor Yin first helps her to understand the concept and then gives her the opportunity to solve the problems on her own. His tutoring is not just limited to her homework… I want to thank Professor Yin’s professionalism and his dedication to help his students succeed. His serious work attitude makes him an effective mentor to his students. My best Christmas gift this year was when I saw Melissa’s progress report had improved from a B to an A+. I am very fortunate to have Professor Yin on my team to help Melissa succeed in school."

"I have a seventh grader who needed to build his aptitude and his confidence in math. After just a few weeks with Mark, he was able to change Alec’s average grade into B+ and even A scores. Alec really appreciates Mark’s approach, which isn’t high pressure. In fact, he helped Alec relax and keep things in perspective. He made Alec confident going into the tests. We’re grateful to Mark for giving Alec the edge to do well."

"I struggled a little of the beginning of 6th grade, but Mark helped me get through it. I ended up in honor roll. Little by little, Mark has helped me learn more by myself and get B+ or above in Math. I give Mark’s work a lot of credit for those grades, and I couldn’t be more thankful for them."

"Dr. Yin is well known, and many students recommended him in the area. I drove one way over an hour, sometimes during heavy traffic time, 3 hours on the road in order to get one hour tutoring from Dr. Yin, but it all paid off. After a few months tutoring on a weekly/biweekly basis, my son achieved the highest math score he can get, and exceeded everyone’s expectations. We are very happy for the end result."

"Dr. Yin is obviously brilliant, but he is more than that: he is patient, gentle and passionate about teaching – and he makes sure the student understands the concepts before moving on. He is so dedicated that he will stay up late to meet with them before important tests, and has skyped with them from time to time, when that was the only means by which to work. Our kids don’t feel intimidated or anxious in his presence. In fact, they look forward to meeting with him. He has given them so much confidence in their mathematical abilities."

"If I could give a 6/5, I would…. I would advise anyone to go with the Yin Academy for any type of help with regards to math or science at all levels. " from Yelp review.

"[Dr. Yin] always made sure I understood the concepts I was learning in class and didn't mind explaining them more than once until I got it. I would highly recommend Yin Academy if you're looking for any type of math or science tutoring!" from Yelp review.

"Dr. Yin tutored me from freshman year of high school until senior year, and he was absolutely fantastic."

"I walked away from each and every session with a newfound sense of confidence and control over the material."

"Congratulations to our 2018 high school graduating students accepted by MIT, Duke, Cornell, Dartmouth, NYU, University of Southern California, Boston University, UCLA and many others! Congratulations to our students who achieved a perfect score in the SAT this year!"