Teachers in one Lawrence County school district could go on strike tomorrow. The Columbus Day holiday and more negotiations are all that’s keeping teachers in the Ellwood City School District from going on strike. The 130 teachers in the Ellwood City Education Association say they’ll strike Tuesday if a new contract isn’t struck  before then. The last contract expired June 30. The school board and the teachers’ union have both expressed optimism that they’ll work out a deal before then but, so far, it hasn’t happened.