teach in
/ˈtitʃˌɪn/
noun
- An informal meeting or lecture, often held at a university or community center, where people discuss a controversial or important issue, usually with a political or social focus.
- During the 1960s, many colleges held teach-ins to protest the Vietnam War.
- The students organized a teach-in about climate change and invited guest speakers.
- The community center hosted a teach-in on voting rights and local politics.