After finding black mold in several classrooms at a Williamsburg middle school, education officials say the building is now safe. Some parents and students, however, aren’t so sure, and will bring their concerns to a meeting Monday night.

New York City’s Education Department says it plans to add a total of 34,000 seats for students over a five-year period. But the number lags behind an estimated 50,000 seats needed to meet demand.

The lawyer for Williamsburg Charter High School, a troubled Brooklyn school that the city’s Department of Education has flagged for closing, made a forceful case at a hearing on Tuesday for keeping the school open.

Former school teachers and principals, political aides and the spokeswoman for two Congressional leaders are among the people in Chancellor Dennis M. Walcott’s cabinet.