Stephan Goyne entered teaching as a "fight the good fight" kind of guy, taking a job in East Oakland right out of college. "I come from a family of teachers. It wasn't even a question of whether to do that," Goyne said. "The question was whether to do elementary, middle or high school." But after six years in the trenches -- transferred from campus to campus, forbidden from organizing field trips and ordered to teach math only after lunch -- Goyne left the profession. Now he works in real estate and runs a Brazilian jiujitsu studio in Oakland. "That last...