The plaintiffs in a federal lawsuit against Jefferson County Public Schools over the district's new student assignment plan have dropped their suit.Their attorney, Ted Gordon, says the parents have had their complaints with JCPS resolved or have opted to home school their children.A handful of parents of kindergarten students claimed the children were assigned to their schools based solely on race. Gordon says it's possible he could bring additional cases to the court if other parents come to him with complaints.The U.S. Supreme Court ruled in 2007 that the previous JCPS assignment plan was unconstitutional because it relied to heavily on race.