Part of the reason is state policy. But several schools have adopted the dual-language immersion model.
Half the student body have been English learners at some point in their education.
They traveled to the United States alone, some fleeing war and violence. Then the only agency in Philadelphia authorized to help them shut down suddenly.
The aim is to help parents and teachers find books that students will want to read.
Northern Texas teacher's policy sparks national debate
The program was touted as a way to help students who did not have permanent teachers for much of the year catch up.
The groups say that poor-performing cybers should be closed.