Alternative education encompasses many pedagogical approaches differing from mainstream pedagogy. Such alternative learning environments may be found within state, charter, and independent schools as well as home-based learning environments. Many educational alternatives emphasize small class sizes, close relationships between students and teachers and a sense of community.
The legal framework for such education varies by locality, and determines any obligation to conform with mainstream standard tests and grades.
Alternative pedagogical approaches may include different structures, as in the open classroom, different teacher-student relationships, as in the Quaker and free schools, and/or differing curricula and teaching methods, as in the Waldorf and Montessori schools. Synonyms for "alternative" in this context include "non-traditional," "non-conventional" and "non-standardized". Alternative educators use terms such as "authentic", "holistic" and "progressive".
Alternative education grew up in response to the establishment of standardized and compulsory education over the last two to three centuries. Educators including Jean-Jacques Rousseau, Swiss humanitarian Johann Heinrich Pestalozzi; the American transcendentalists Amos Bronson Alcott, Ralph Waldo Emerson, and Henry David Thoreau; founders of progressive education John Dewey and Francis Parker, and educational pioneers such as Friedrich Fröbel, Maria Montessori and Rudolf Steiner believed that education should cultivate the developing child on many levels: not only intellectually, but also morally and spiritually, emotionally and psychologically, and physically. After World War II an alternative Reggio Emilia approach to early-childhood education was developed in Italy, introduced by Loris Malaguzzi.
Cultural critics such as John Caldwell Holt, Paul Goodman, Frederick Mayer and George Dennison have examined education from individualist, anarchist, and libertarian perspectives.