"2009Z"^^ . . . "Sizer, Theodore"@en . "Theodore R. Sizer"@en . "American education reformer" . . "2009-10-21Z"^^ . "1932-06-23Z"^^ . . "Theodore Ryland Sizer (June 23, 1932 \u2013 October 21, 2009) was a leader of educational reform in the United States, the founder (and eventually President Emeritus) of the Essential school movement and was known for challenging longstanding practices and assumptions about the functioning of American secondary schools."@en . . "1932Z"^^ .