Berthold Otto (6 August 1859 – 29 June 1933) was a German educator and pedagogue who specialized in children's education. He founded a home school in Berlin-Lichterfelde in 1906 originally called the Hauslehrerschule which is now named after him. He believed in the individuality of children and the idea that every child was a genius until the age of six. He also founded a periodical called Der Hauslehrer.