The Middle Years Programme By Mark Twain IS 26 March 200826 March 2008 Mark Twain International School is authorized to offer its second International Baccalaureate academic programme, the Middle Years Programme, designed for students grades 5 to 10. Previous The International Division of Mark Twain International School is created 26 June 2013 Next The MTIS Choir records its first album 20 October 2003