Α 2-day train-the-trainer workshop takes place on 16 and 17 May 2018 in Amsterdam,aiming to exchange know-how on the support of sexual diversity in schools and the development of training material for project partners from Greece, Cyprus and Lithuania. The workshop is based on the GALE tool (GALE toolkit, 2013) providing guidance on the development of training materials for school counselors and teachers in the participating countries.