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Devender sir is having lots of experience in teaching line . He is doing social work for poor children . He works hard for education.

I know Dr. Devender for the last seven years. He is a very good teacher. His methodology of teaching ix excellent. I wish him success in life.
Dr. D. R. Vij
Professor of Physics (Retd.)
Kurukshetra University,
Kurukshetra (India)

Good understanding moreover teach in sagacious way