

The largest practical science lesson is 4,272 participants, and was achieved by iScience WORLD, Shri Mahaprabhu Public School and Delhi Public School Prayagraj (All India) in Prayagraj, Uttar Pradesh, India, on 14 December 2019
The lesson was focused on Water. Pryagraj being a city where three Rivers meet. water holds a great value to the locals.