Time will tell if the ''Largest Science Lesson'' ever has set a world record. Students at Bridgewater High teamed up with Canadian Astronaut David Saint-Jacques to simultaneously throw paper airplanes this afternoon with thousands of other students across the country. The world record attempt helped teach the students about gravity and the atmosphere on Earth, Mars and the moon. Teachers Jane Berrigan and Chad MacPhee helped bring the event to the school. MacPhee says its a special day for the kids, even if they don't set a world record.About 500 students in Bridgewater and more than 10,000 nationwide were involved in the event. Organizers say paper work and video has to be sent away from all schools involved before a world record is confirmed. They feel it will take a few weeks before they know if they set a Guinness World Record.