AdvertisementMany teens don't know how to swim. A grassroots organization is trying to change that04:27Download AudioResumeJune 09, 2023Anastasia TsioulcasfacebookEmailFirst Strokes is a New York-based organization working to get teens in the water safely — and to try to remove the barriers to learning. Above, a First Strokes class at Hill Regional Career High School in New Haven, Conn. (First Strokes)