The board of education says it has looked into the concerns surrounding two cases of possible plagiarism by Superintendent of Schools Carolyn R. Koos, and is "satisfied that she understands her mistake and will not repeat it," board president Louis Casella said in a statement. "The board has fully expressed and discussed its concerns with the superintendent," Casella said. "Superintendent Koos has apologized for any adverse effect this may have had on the district." NJ.com first reported the possible plagiarism Jan. 10, when a letter sent to the district appeared to be a near word-for-word copy of a Nov. 27...