Graduate students who teach at the University of Michigan have returned to classes after voting to end a strike. The Graduate Employees' Organization represents about 2,000 students who teach or assist classes. The union says it achieved "critical progress" on child care options during the coronavirus pandemic, COVID-19 testing protocols and concerns about campus police operations. The deal ends legal action by the university, which sued this week to try to end the strike. The university says the strike disrupted many online undergraduate classes taught by graduate students.