Charlie Kyte: Outgoing executive director of the Minn. Association of School Administrators. 20 years experience as a school superintendent, including 12 in Northfield. Former high school principal and math, physics and chemistry teacher.
Twitter co-founder Jack Dorsey at the Commonwealth Club Jack Dorsey created Twitter and launched the company in 2006 with two partners. He is the executive chairman of the company and leads product development. The Commonwealth Club of California named Dorsey its 21st Century Visionary Award winner and invited him to discuss how Twitter came about and talk about his new venture, Square, which lets users accept credit card payments for their products via mobile phones.12:00 p.m.