A school board member in Bucks County's Centennial district has resigned his post as president of the Pennsylvania School Boards Association over a tweet that included a photo of chimpanzees staring at a computer screen and a comment about the cost of cyber charter schools.

Mark B. Miller, 66, sent the tweet in response to Quakertown Area Superintendent William Harner’s remark in the Inquirer on Sunday that it costs more to educate a student at a cyber school than a traditional school.