Plan to attend a retirement celebration in honor of Superintendent Sheri Allen on May 16 (Thursday), 3:30 p.m. to 6 p.m., with a program at 4:15 p.m.  The event will be held in the Mankato Room on first floor of the Intergovernmental Center, 10 Civic Center Plaza.  Dr. Allen has served as superintendent of Mankato Area Public Schools since 2009.