St. Mark Lutheran Church, 21st & Jackson, Great Bend, will host a Walking Taco Supper from 4:30-6:30 p.m. Sunday, Sept. 21, in the church fellowship hall.  The menu includes build-your-own tacos, dessert and drink. Admission is by freewill offering. Proceeds will go to the Education Assistance Fund to assist children of the church who are attending Christian-based schools.