Foss Swim School is located at 3026 N. Ashland Ave, Chicago, IL 60657.  Call Us 773-248-3677. Swim School, Toddler Swim lessons.  Foss Swim School is a talented and energetic group of professionals dedicated to executing the world's best learn-to-swim program for your family. Since 1993, FOSS has redefined the ""swim lesson"" experience for thousands of swimmers by providing a unique, creative, animated, challenging, and remarkably ""FOSS"" style of teaching.   Foss Swim School - Chicago (Lakeview) 3026 N. Ashland Ave. Chicago, IL 60657 Phone: (773) 248-3677 Mon-Thu 9:00 am - 7:30 pm, Fri  9:00 am - 5:00 pm, Sat & Sun  8:30 am - 1:00 pm