Science is seen as an ongoing process. In addition to the basic characteristics, science information is framed within the context of seriation, classification, and conservation. Seriation is developed by providing experiences in life cycles and natural processes. Conservation is the basis of science in that science has predictive value, and conservation allows for consistencies across superficial changes. Classification abilities are developed through consistent and exhaustive sorting, multi-membership classification, and inclusive classifying.
Concrete operation allows the child to manipulate and experiment in building a knowledge base.
Information can simultaneously cross categories and be subcategorized. Formal operations allow the child to generate hypotheses, predict outcomes, and structure experiments. University of California at Berkely, 1981. Montessori in Contemporary American Culture, American Montessori Society. Heinemann Educational Books, 1991.