California’s computer science problem may come down to one word for schools: money. Although plans like the one in San Francisco, which aims to become the first large urban school district in the country to promise to expose students to computer science from pre-kindergarten through 12th grade, are lofty, much attention needs to be paid to the practical side of the equation: funding. Right now, in San Francisco’s 18 high schools, just 10 offer computer science.