PRAIRIE GROVE – The District 46 school board on Friday imposed the terms of its “last, best and final offer” on Prairie Grove Teachers’ Association, after 18 months of contract negotiations.

The district board in a news release highlighted a few of the “significant changes” in the contract, including an increase in the salary offer. But the district disclosed no figures or additional details.

Prairie Grove Teachers’ Association members, wearing black “PGTA” T-shirts, quietly walked out of the library at Prairie Grove Junior High and declined to comment on the four-year contract that goes back to 2011 and runs into 2015.