The Atlanta school board on Monday delayed making a recommendation on the future configuration of Washington High School, which now operates as a group of small schools, each with distinct leadership. District 2 board member Byron Amos — who favors closing the small schools and “making Washington whole again” under one principal — persuaded the board to delay deciding until its Sept. 27 meeting. Amos said Washington has struggled over the last two years under the small schools format, with declining student grades and graduation rates.