On Thursdays at 6:30 p.m. from April 25 through June 27, Sigrid Wonsil, artist and teacher at Elgin Community College, offers 10 sessions that cover “100 MUST KNOW Artworks.” If you’ve ever been curious about what makes a piece of art worth millions and its artist world famous, she will show through slides and movie clips examples of paintings, sculpture, architecture and photography of significance and reveal some little known facts about their creators. Reservations are required. You can take single sessions for $10 for Arts in Bartlett members; $15 for nonmembers or sign up for the whole 10 series on the ticket Page of www.artsinbartlett.org