You can find materials for classroom use at the International School for Holocaust Studies at the website run by Yad Vashem: the Holocaust Martyrs'
and Heroes' Remembrance Authority museum of the Holocaust based in Jerusalem. While this education centre is focused on schools, the entire website is worth a lengthy visit. It is packed with documentary evidence and witness diaries that are important, both personally but also as stimulus for further work. Be prepared to return as there is a mass of fascinating information.