A teach-in is similar to a general educational forum on any complicated issue, usually an issue involving current political affairs. The main difference between a teach-in and a seminar is the refusal
UCLA Vietnam Day Committee leaflet promoting its 25 March 1966 antiwar teach-in
Crowd of people holding candles at a march at night to the White House, lead by Coretta Scott King as part of the Moratorium to End the War in Vietnam. (October 15, 1969)