In this photo taken May 23, 2011, the exterior of the Willie L. Brown Jr. College Preparatory Academy Dream School is seen in San Francisco Over the last decade, the College Preparatory Academy has seen enrollment plummet and student performance lag. Just 15 percent of students scored proficient in reading on state tests in 2010, and 17 percent in math. (AP Photo/Eric Risberg) The Associated Press In this photo taken May 23, 2011, the playground and exterior of the Willie L. Brown Jr. College Preparatory Academy Dream School is seen in San Francisco. Over the last decade, the College Preparatory Academy has seen enrollment plummet and student performance lag. Just 15 percent of students scored proficient in reading on state tests in 2010, and 17 percent in math. (AP Photo/Eric Risberg) The Associated Press In this photo taken may 23, 2011, Assistant superintendent Patricia Gray gestures during an interview at the Willie L. Brown Jr. College Preparatory Academy Dream School in San Francisco. Over the last decade, the College Preparatory Academy has seen enrollment plummet and student performance lag. Just 15 percent of students scored proficient in reading on state tests in 2010 and 17 percent in math. (AP Photo/Eric Risberg) The Associated PressSAN FRANCISCO (AP) — At San Francisco's Willie Brown Jr. College Preparatory Academy, enrollment has plummeted and student performance has lagged. School officials have decided it's better to close.It's one of a very small number that have chosen to take that route.For better or worse, district officials are reluctant to close neighborhood schools — even when they have been shown to produce poor results for years or even decades.The U.S. Department of Education is devoting $3.5 billion — the largest amount ever — to turning around the nation's failing schools. More than 800 have been identified as "persistently low achieving."Of those, just 16 are closing. How effective the closures are will largely depend on where children are sent. Not all of the new schools are significantly better.