After months of negotiations, the Farmington teachers union has reached a tentative contract agreement for 2015-17 with the district's school board.

Farmington teachers will vote on the contract first, with the school board voting at their June 13 meeting.

Contract terms won't be shared until votes are in and the contract is final.

An early offer by the district proposed a 1.5 percent increase in teachers' pay and insurance the first year and an additional 1.5 percent increase the next, but teachers rejected that offer because it offered no provision on lowering class sizes.

Across Minnesota, 18 districts -- including Bloomington -- are still settling their contracts, about 5 percent of the state's 354 regular districts.

A parents' group, concerned about the lack of progress with Bloomington's contract, passed out 240 lawn signs in a mall parking lot Wednesday in support of teachers, said Chris Williams, spokesman of Education Minnesota.

Among contracts already settled, the average pay increase has been 2 percent the first year and 2.3 percent the second, Williams said.