Sport Annual exchange honours for Mount Gambier High 16/07/2022 Facebook Twitter Email DYNAMIC DEBATERS: Mount Gambier High School's Anna Anbu, Marni Black and Callum McIntyre-McGregor won the Berri Exchange debate, the first time their school had won in over five years. Picture: Submitted THE 77th annual Mount Gambier High School and Glossop High School exchange took place last week. TheSubscribe or log in to read the rest of this content.