Koitur Bata, an academic movement launched in 2001 by 55 school dropouts from three tribes, transformed the lives of thousands who had discontinued education, during the peak of Left-wing extremism in Andhra Pradesh’s Godavari Valley. Over its 11-year span, the school provided education and produced over 30 writers and artists who are now dedicated to preserving their tribal language and culture, finds T. Appala Naidu