HONOLULU (AP) - The union representing Hawaii's public school teachers will be negotiating with the state for a pay increase. The Hawaii State Teachers Association told members in an email the union will return to the bargaining table in March to discuss additional salary and compensation for the remaining two years of the contract. The Honolulu Star-Advertiser reported Saturday the union is exercising a so-called reopener clause in the labor contract that covers to 2013 to 2017. The four-year contract restored a 5 percent pay cut made in 2009, followed by increases of at least 3 percent. The union secured the reopener clause to negotiate for increased pay and benefits once a salary study is completed. That study is expected to be submitted to legislators next week.