DENVER (KDVR) -- Denver Public Schools has tentatively agreed with the Denver Classroom Teachers Association on a new collective bargaining agreement.

The deal comes after a "marathon" bargaining session of more than 18 hours and "months of collaborative negotiations," DPS announced Tuesday.

“We are proud to have reached what we feel is a fair and forward-looking agreement that honors the critical work our teachers do every day,” said DPS Superintendent Dr. Alex Marrero in a statement. “This tentative contract supports our educators, strengthens our schools, and ultimately benefits the students and families we serve.”

The tentative agreement is a three-year contract and includes a 7.88% average salary increase in year one and a 4.15% average salary increase in years two and three, among other things.

Starting in the 2025-2026 school year, the deal also mandates the district provide reports to the class size committee on the number of classrooms exceeding 30 students, specific efforts taken to address oversized classes and circumstances "preventing compliance" with the 30-student target.

Beginning in the 2026-2027 school year, meanwhile, the district will target class sizes of 30 or fewer students in grades K-5, and make "reasonable efforts" to reduce classes that go over this limit, according to the agreement.

“Both sides moved a long way in a short period of time to come to this agreement,” said Executive Director of Labor and Employee Relations Lawrence Garcia, in a statement. “This was completed through the collaborative effort of teams from both DPS and DCTA along with the work of the arbiter.”

The agreement will now be presented to DCTA members to undergo a ratification vote before going in front of the DPS Board of Education for final ratification.