AboutDear Learner, I am a D for Doubts Educator, Hi, my name is Harishankar Ray. I am from Patna . I have completed M.S. in Teaching Mathematics from University sains Malaysia. I have more than 8 years of experience in Teaching Mathematics especially 11th, 12 th jee , foundation. At this time I am a mathematics faculty in a coaching Academy near by Jaipur. at the same time I am doing freelancer subject matter expert for mentor match, air matths. I am also working as a freelancer for Chegg India . Thanks. 
