What is the main event of the book Schooled?

The main turning point in Schooled is when Cap (Capricorn) percieved the incident of a heart attack when riding home from school on the school bus. On the way home, the bus driver experienced a fatal heart attack and the bus was set loose. Therfore, Cap went and grasped control of the Bus thanks to his country driving skills and safely drove the bus back home. After this turning point, Cap was deemed as "popular" at his school and his hippie culture was widely spread into his community.