World record attempts have been a key part of IISF since 2015, thus encouraging science popularisation through public participation. In IISF 2015, students took a successful shot at the Guinness world record for the World's Largest Science Lesson at IIT Delhi. In IISF 2016, at NPL, Pusa, a group of 550 students attempted the world record for Largest Gathering of People Dressed as Nobel Prize-winning scientist Albert Einstein.
In IISF 2017, a World Record attempt will be made in "Largest Biology Lesson". 1000 students from Class 9th & 10th will be gathering at the venue in Chennai for this attempt. The biology lesson will be delivered by the instructor followed by a demonstration..