I am studying in nucleus education this year it is in my opinion the best coaching in kota for iit jee the teachers here are great and the most popular maths faculty amarnath anand sir or popularly known as anna sir then Vishal Joshi sir popularly known as vj sir also known as god of inorganic chemistry then skm sir for organic chemistry and akk sir for physical chemistry all are great and I am sure you will start loving the subjects once you are taught by them