Retired schoolteacher Subhash Chandra Kundu, who taught physics for free to needy children with merit and had become an institution by himself in North 24-Parganas’ Basirhat, died on Friday night. Kundu was 74.

He had won the lifetime achievement award at The Telegraph School Awards for Excellence 2018.

On a 2-cottah plot, Kundu had created the Tutorial Institute of Physics in 1988 and taught children from Class IX to the undergraduate level.

Kundu was partially paralysed by a stroke about a decade and a half ago but that did not stop his work.