From the Guardian here:
At another of Apple’s major contractors, Wistron, a Danish human-rights NGO last year found extensive evidence of forced student labour. Teenagers doing degrees in accountancy or business management were sent for months to an assembly line at Wistron. This is a serious violation of International Labour Organisation convention, yet investigators for Danwatch found evidence that thousands of students were doing the same work and backbreaking hours there as the adults – but costing less.
The teenagers told Danwatch that they were working against their will. “We are all depressed,” one 19-year-old girl said. “But we have no choice, because the school told us that if we refused, we would not get our diploma.” Despite several requests for comment, Wistron did not respond.