(Portland, OR) -- Students in the Portland Public Schools district are returning to the classroom this morning following a three-week-long teachers' strike. Officials say classes are scheduled to resume this morning but will start two hours late. The school district and the teachers union reached agreement on a tentative contract yesterday. The Portland Association of Teachers says it gives teachers pay raises, more time to prepare and additional mental health supports for students. The school district released a statement saying they're relieved students will return to school. The missed school days will be made up by reducing winter break, adding days in January, February, and April and extending the school year by three days.