I am 75 years old, a doctorate in chemistry, worked for 40 years as a R&D scientist and have been a teacher also to PhD students. So my opinion about Shri Prakash Rastogiji as a teacher is of very high order. His classes are very interesting as he strives hard to make all of us understand very well in the short time of the course for a vast subject field. My getting so much of interest to learn is a reflection of his teachings.