New German School
Harless joined the "Neue Deutsche Schule ("New German School")" of Alexander Sutherland Neill, who later became the founder of the progressive Summerhill School. After the closure of "Neue Deutsche Schule" Harless founded his own boarding school in 1928 in the small town of Marquartstein near the Bavarian Alps. In its first year, only 16 students enrolled in "Landschulheim Marquartstein."