A school board member who voted for requiring the teaching of "intelligent design" as an alternative to evolution in a York County high school has resigned after failing to get the board to reconsider its vote.Angie Yingling announced her resignation from the Dover Area School Board at last night's board meeting. Yingling was among the majority who voted 6-to-3 on October 18th to mandate "intelligent design" - a concept that attributes the universe's complexity to the work of an undefined intelligent force. Dover is believed to be the first school district in the nation to impose such a requirement.