(Providence, RI)--Providence Mayor Jorge Elorza's proposal to expand Achievement First Charter School is getting approval from the school board.The proposal to expand to three-thousand students has the backing of the state's governor and education commissioner, but must still get the OK from the Rhode Island Council on Elementary and Secondary Education.Elorza previously proposed allowing Achievement First to expand while restricting the growth of other charters in Providence with the goal of protecting traditional public schools, but that idea has not received support.