A D.C. councilwoman Monday pressed Schools Chancellor Michelle Rhee to explain what went wrong in her attempt to create a special school for the city’s most troubled kids.

Mary Cheh, D-Ward 3, said Rhee should give a public explanation for a series of costly failures at the Transition Academy at Shadd Elementary, a refuge school designed to provide intensive therapy for some 175 “emotionally disturbed” teens and young adults.