The justices will be asked to determine whether they should intervene. Gov. Wolf says no.
A tax hike of 4.44 percent will have to be withdrawn for the 2016-17 school year.
The changes mark a shift away from "zero tolerance" policies.
It upheld a lower court's decision that the SRC could not unilaterally cancel the teachers' contract. The union's leader says he hopes the ruling helps restart contract negotiations.