A Fond du Lac elementary school principal is retiring. The Fond du lac school board is expected to accept the retirement of Robert Elementary School principal Rick Gregory at their meeting Monday night. Gregory will be retiring at the end of the school year after 16 years of service to the district. Superintendent Dr. Jim Sebert says Gregory has been a tremendous asset to the district. “His genuine, caring approach to kids, families and staff is highly respected and will long be remembered,” Sebert said.