Timeline: How did Dayton schools and the teachers reach this point?

April 7: The district and the teachers held the last of 19 face-to-face negotiation sessions since Jan. 6.

April 17: The parties declared impasse in negotiations, leading to the involvement of a federal mediator.

April 26: Hundreds of teachers attended the Dayton school board meeting and then rallied outside.

May 4: Dayton Public School teachers authorized their negotiations team to issue a strike notice in the future "should the status of contract negotiations not improve."

May 16: Dayton Education Association President David Romick told a crowd of 70-plus teachers and supporters that too little has changed in roughly 175 hours of negotiations since Jan. 6.

June 6: A federal mediator suspended mediation for the months of June and July due to a lack of progress.

June 30: The teachers' existing contract expired.

July 26: Superintendent Rhonda Corr announced DPS will open on the first day of school on Aug. 15, regardless of whether teachers are on strike.

July 31: The union served a 10-day notice to Dayton Public Schools, opening the door to a possible strike on Aug. 11.

Aug. 3: DPS and the teachers union went back to mediation, seeking to resolve several key issues including health insurance, pay, additional staff, teacher planning time, time clocks.

What’s happening this week?

Monday: Mediation scheduled all day.

Tuesday: Regularly scheduled school board "review session" meeting at 5:30 p.m.

Wednesday: Mediation scheduled all day.

Thursday: First scheduled teacher training day.

Friday: Strike would start at 12:01 a.m. Friday if no tentative deal reached. Otherwise, this will be the second scheduled teacher training day

Sunday: DPS Back to School Rally, 11 a.m. until 3 p.m. at Ponitz CTC

Aug. 15: First day of school. Regularly scheduled school board business meeting at 5:30 p.m.