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Developmental change of one or more characteristics of the educational system variables in a positive direction in terms of some valued criterion. Use more specific descriptor where appropriate.

Systematic process of producing new curricula or improving existing ones; involves setting out aims, content, methods, evaluation procedures. D	Diversification de l'	Changes in objectives, content or methods initiated, as a rule, in experimental situations. Innovation
Change planned or in process of implementation to a major part of a national system of education. R	Changes in educational movement, either past or future, which occur in response to social, economic or environmental trends. Tendance de l'