teach–in 
/ˈti:tʃˌɪn/ noun
plural teach–ins /ˈti:tʃˌɪn/ noun [count] US : a meeting usually held on a college campus for people to talk about and learn about something (such as a social or political issue)
▪ The group held a teach-in to discuss discrimination.
▪ The group held a teach-in to discuss discrimination.
