The so-called summer “blitz” of desperately needed repairs in the crumbling D.C. Public Schools has been slowed by months thanks to missteps and poor planning on the part of school officials, the D.C. Council was told Monday.

Allen Lew, acting director of the fledgling Office of Public Education Facilities Modernization, said the all-out repair effort, which Mayor Adrian Fenty had promised would be completed by the first day of school, will now last well into the fall.