Could victims of GRPS teacher's sex abuse be able to sue the school district?

The answer: yes, they could sue the school district under Title IX. But whether they'd succeed is another question. Article here. 
 From the article:

Nelson Miller, associate dean and professor at Cooley Law School's Grand Rapids campus, said a successful civil case against GRPS would have to meet a high standard. He said the deliberate-indifference standard is one half of the Title IX standard, with actual notice being the other part.

"The challenge is that the school district would have had to know of the conduct of that teacher plus show deliberate indifference to it," he said. "If the school takes appropriate action on actual notice, there is no liability."

Former Grand Rapids teacher sentenced yesterday to prison for sex with students

Wyoming resident Jamila Williams will spend at least three to six years in prison after she pleaded no contest to four counts of criminal sexual conduct with the teen students. The former Grand Rapids public school teacher was suspended from her job and ordered not to be unsupervised with children under 16.

She was sentenced yesterday in Wyoming, article here. Updates as to exact sentencing should be posted later today.

*** Update: She received 8 - 15 years at her sentencing, article here.