Silver Lake College invites the community to the college-wide “Silver Lake College Symposium: Celebration of Ideas,” from 8:50 AM to 4:30 PM tomorrow on the campus, located at 2406 S. Alverno Road in Manitowoc. “Expect the Unexpected,” a program of operatic scenes sung by Opera Workshop students, will be presented at 9:30 a.m. in the Franciscan Center for Music Education and Performance. The free event includes music, art, posters and oral presentations. Come for one or two sessions or stay all day. For more information, visit sl.edu.