 Green told his family since the teachers hadn't learned that way, they'd never tried hands-on teaching. But the teachers quickly saw how students could discover science themselves. The rural teachers scoffed when the American volunteers promised to visit during the school year. But Green and his colleague were determined. They took crowded buses and then trekked on foot through the mountains to reach one remote school, lugging a film projector with them. They recorded their adventures as they went.