Monitorial education system Bell-Lancaster 19th century, P.C. Klæstrup, before 1882

Water drawing of the "monitorial system" ". An education method that became popular on a global scale during the early 19th century. This method was also known as "mutual instruction" or the "bell-lancaster method" after the british educators dr andrew bell and joseph lancaster who both independently developed it. . ". Date: before 1882.