Eighteen-year-old Charity Befford lives in the projects of San Francisco’s Hunters Point neighborhood. The monthly groceries her single mom buys with traded food stamps, she says, often don’t go far enough to last the two of them and the several half-brothers who frequently visit. Befford doesn’t much like school and isn’t doing well academically, although she’s still determined to graduate this year so she can go on to college and move closer to her goal…