Chairman & Director, Kasturi Education | Former Course Director, Pathfinder | Former Professor and HOD of Mathematics, FIITJEE | 23+ Years of Teaching Experience | PhD Researcher, Applied Mathematics

A world class teacher. He creates a love for Mathematics in each one of us and injects it. The concepts are lucidly explained. He provides unique ways to solve a problem. He motivates his students each day. You get the effect after one class

Kasturi Education is undoubtedly one of the best institutes of India teaching mathematics and currently I'm studying there and I am very satisfied.I have been learning from the best- the art of problem solving and problem analysis effortlessly. Kalyan Sir started our classes with no delay on the online mode so that we stay ahead even in this situation. He teaches us with well equipped accessories which is required for a perfect online class.

So, I strongly recommend anyone in Kolkata who is aspiring to perform well in competitive examinations to learn from the best, KR Sir. Join Kasturi Education Private Limited.

If you want to fall in love with Mathematics, trust me, you are at the right place. Kalyan Sir is the best Mathematics teacher in India. If you are afraid of facing the difficult questions, KR sir provides you the right light to solve JEE problems . You will surely become confident for your selection in IIT.

He is an excellent teacher.Moreover he is ready to help us to solve any doubt in the subject whenever we needed .His way of teaching is unique.

KR Sir is an excellent teacher. He clears concepts right from the basics, and teaches us innovative methods to solve problems.

Kalyan Sir is the best teacher I have ever had. He has made my concepts in mathematics crystal clear and has taught me to keep challenging my own knowledge and skill to figure out better ways of solving problems. Understanding maths has never been easier as he teaches us using real life examples which are entertaining as well as insightful. I am lucky to have found a teacher like Kalyan Sir.

Sir is an amazing teacher. He simplifies maths and makes it easier to understand. The maths tricks that sir teaches us are very simple,easy to understand and saves calculation time.

Sir is the best teacher for Mathematics, it is seen not only in the way teaches but in the process he leaves no doubt in the minds of the students. The way he teaches is extraordinary. As he says, a child is completely taken care by KR Sir, I personally feel so because he inspires us and helps us know what the subject is. I would like to thank you Sir for your constant efforts in guiding and inspiring us.
Thank you Sir

"What is better than a thousand days of diligent study is one day with a great teacher"
~ Japanese Proverb
Yes thats right, it took me just one class to identify that I cannot possibly find a mathematics teacher better than KALYAN SIR.
Kalyan Sir is the TIER 1, top notch and most professional mathematics teacher that I have ever seen in my life. Not only does sir have the complete grasp of the subject but also knows every minuscule and intricate detail of the subject and how that benefits us is that he passes down the same knowledge to his students as well. This way we, as in all his students, see mathematics as a quintessential tool to solve our problems. The reason why sir is set apart from all other teachers is his unique solutions to lengthy problems which cannot be found anywhere else and is completely authentic.
Sir also gives amazing examples from real life wherever he can to help us reach to the core of the concept and make our understanding crystal clear and self evident.
This helps us to develop an analytical thinking which will help us to solve questions throughout our life.
I just want to say that I am very lucky to find Kalyan Sir as my teacher and I can be rest assured that my mathematics will be in safe zone. I really hope to prosper under sir's excellent guidance.
Thank you Sir For Being So Helpful

He is the best

I am a student and I think Kalyan Sir teaches very well. No matter the topic he always starts from the basics, so a student who was previously unskilled in a particular section can clear their doubts and start anew. He relates many sums and theorems to real life, helping the students relate to the sum. If students are still doubtful about a particular sum/formula/topic, Sir will not move forward until the students' doubts have been cleared. One can expect to go into his class, laugh, learn and experience all in a short time. Being taught by Sir is an experience to be remembered for a lifetime, be it the modern solving technique or overall attitude towards mathematics. As Sir says, "I do not teach mathematics, I train in mathematics."

KR sir is the most perfect teacher I have ever came across. He starts just from the basics and provides every detailing wherever necessary... He inspires us to think a problem and the topics all together from a different perspective and introduces us to the beauty of mathematics.. His tricks works magically and it enhances our speed and accuracy... he is the one and only teacher who makes all the students fall in love with mathematics... The one whose guru is KR sir is indeed the most blessed and fortunate creature in the world.

Kalyan Roy Sir is not only an excellent teacher but also an excellent guide as well. His unique approach to problem solving makes even the most difficult sums just a matter of seconds. He inspires us to work harder and become better everyday. Any student aiming to crack IIT JEE exam must approach Kalyan Sir. He will make sure that you learn the concepts thoroughly and remember it for a long time.

Kalyan sir doesn't only teach but he preaches.It was only in stories that we hear about teachers so good that they can change you but it's a reality for me. He works day and night just for the betterment of his students. He teaches us not only math but all the values that will make us a better and good human. I am very grateful that I got such a teacher in my life.

If solving sums is an art then Kalyan Sir is an unparallel artist and a perfectionist in the field of mathematics for more than a decade or two.Highly inspirational

Previously, I had always considered maths as a subject to deal with. But within a month of meeting our respected KR Sir, everything changed! I started loving the subject. Sir, you are the best teacher any student can ever have! Thank you for being our inspiration and leading us to a bright future!

I think Kalyan sir is the best IITJEE teacher in Kolkata. He starts from the very basics and then proceeds to higher level. He not only teaches how to solve a problem but also make you fall in love for the subject. He also teaches many time saving tricks which are very helpful.

Kalyan sir is an awesome teacher.The way he starts from basics and goes to higher levels is excellent.His notes and the way he gives simple solutions to complex sums is commendable. His unique style of teaching is always remembered by all the students. Overall he is a brilliant teacher.

Kalyan Sir not only teaches in a simple manner but he also helps understand each and every concept through examples from daily life. He makes sure that each of his students have understood the concepts completely and would do anything to do so. One is bound to taste success under his guidance.

Kalyan Sir is an amazing teacher.He injects mathematics into his students so that they can feel the subject and solve it naturally. He uses real life examples to explain every concept which helps us to understand more easily.He makes his students simply fall in love with the subject.