Every member of Urban Prep's senior class has been accepted into a four-year college or university. The school's first senior class had the same record last year.
Urban Prep claims to be the nation's first all-boys public charter high school comprised entirely of black males.
School officials say when this year's senior class entered as freshmen in 2007, only 11 percent were reading at grade level. Now they're headed to college.
Chicago Mayor Richard Daley congratulated the seniors at an event Wednesday.
Last year, the mayor's office said the average college enrollment rate for Chicago Public Schools was just over 54 percent. The average graduation rate for black males was 41 percent.