Meeting Thursday night, the Bulloch County Board of Education renewed Superintendent of Schools Charles Wilson’s contract for two years, boosting his salary by $20,000 the first year and promising another $10,000 the second year, if measures of progress are met.Previously $135,000, his salary as chief executive of the 15-school, 10,000-student system will be $155,000 in the first year of the new contract. It will rise to $165,000 the second year, subject to a review, before March 31, 2015, of “the system’s progress toward agreed-upon initiatives,” the contract states.Board members unanimously approved the new contract after an extended closed-door session at the end of Thursday’s public meeting. Wilson stepped out of the closed session while board members discussed his contract.