The man and fellow retirees behind a science lab for students in rural India

The 10th-grade girls are acing it when it comes to verifying Ohm’s law in this remote village school. The boys are close behind, but the groups of girls seem to have done their math right and paid more attention in class. Ohm’s law, a fundamental part of physics, states that voltage and current are proportional. The students are trying to verify the law by conducting experiments on a resistance board.

Sharad Godse, the equally enthusiastic 77-year-old who is supervising the action, explained the law earlier in the day and is rather happy with the progress. “It shows their math skills are not bad,” he says, smiling, before proceeding to show students the various applications of Ohm’s law in household objects.

The 10th-graders are from Mahude Madhyamik School, some 50 miles from the city