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WordNet
training school
  1. n. a school providing practical vocational and technical training

  2. correctional institution for the detention and discipline and training of young or first offenders [syn: reformatory, reform school]

Wikipedia
Training school

A training school is an official designation, awarded by the Department for Children, Schools and Families, to schools in England that provide exceptional facilities for in-service and work experience training of teachers. There are around 230 training schools.

They are described "As centres of excellence for training, Training Schools act as experts in adult learning and the transfer of skills, and provide a venue for high quality professional development."