Scientific reasoning is particularly pertinent to science education since it is closely related to the content and methodologies of science and contributes to scientific literacy. Much of the research in science education investigates the appropriate framework and teaching methods and tools needed to promote students' ability to reason and…

Guidelines for developing performance assessments in science education allied with current research and reform are presented. The guidelines are applied to 3 hands-on science investigations performed by over 300 fifth and sixth graders and scored by science educators. Although difficult to develop, such assessments can be scored reliably. (SLD)