The more than 700 teachers in 17 high schools in the five-county archdiocese are scheduled to vote on the tentative agreement Monday morning.
Teachers went on strike Sept. 6, citing issues including sick leave and the use of part-time instructors. Administrators said the teachers were resisting attempts to modernize the schools.
Neither side would discuss details of the tentative deal until after Monday's vote.
Students attended the first few days of school for orientation and standardized tests, but closed its high schools late last week because of low staffing levels.