"Rather than enhance diversity in the district, this would send us in the opposite direction," said Edward Kindall, one of the board members who voted against the plan. "I went to segregated schools and this gets us dangerously close to separate but unequal."

The school board also approved, by votes of 9-0 and 8-1, two other charter schools Tuesday, both of which will cater mainly to low-income students. Mr. Kindall backed both schools.