A student, 16, was arrested in the alleged assault on another 16-year-old boy at Chicago Tech Academy.
Since December 2013, four people have been banned from attending the monthly meetings.
Parents at the school are asking Mayor Rahm Emanuel to speed up plans to air-condition the school.
The mayor's office said the proposed school on the Near North Side would no longer be named after Obama.
Principal Maureen Ready said the cuts will force her to lay off three teachers and consolidate grades.
The grandmother of Mckenzie Phlipot, 12, said Tuesday she "does not agree" with CPS' conclusion.
Dyett High School supporters said they'd met with a sympathetic Mayor Rahm Emanuel, but nothing changed.
CPS performed well in Newsweek's new rankings of top high schools serving low-income students.
Schools on the Northwest Side are making up for budget cuts by relying on fees paid by parents.
Students will get a chance to make their case against the dress code at a town hall on Sept. 11.
Gov. Pat Quinn added $10 million in state funding to bring the number of workers to nearly 2,000.
The school also has considered expanding its building on Loyola Avenue to stay in the neighborhood.
School, on academic probation 11 years, has had two principal changes in less than a year.
The renovations to Taft were "long overdue," said Chicago Public Schools CEO Barbara Byrd Bennett.
Dyett High School was scheduled to close at the end of the upcoming school year.
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