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Chambliss, Marilyn J.; Christenson, Lea Ann; Parker, Carolyn – Written Communication, 2003
Explanation as a genre may support children's reasoning and understanding particularly effectively. In this study, 20 fourth graders were given the task of explaining the effects of a pollutant on an ecosystem to third graders. Before writing, they completed a commercially developed science unit, instruction in reading and writing an explanation,…
Descriptors: Models, Ecology, Grade 4, Grade 3