The importance of culture and social interactions in disciplinary learning and language development within specific social practices and contexts is now an agreed-upon notion in the science education literature. In a pivotal article in 1990, Lemke introduced the idea of manual-technical operations as one of four modes making up the "hybrid…

Some physiological concepts, such as physiology of filtration and absorption in the different nephron segments, are so detailed that they can be a challenge to be memorized. This article describes an exercise that solidifies learning as students manipulate, using paper models, "transporters" and "electrolytes" in the…

Describes eight learning centers/activities designed to promote tactile/sensory experiences in younger children. (JN)

Describes the ways in which primary grade science teachers can use hands-on scientific activities to answer children's questions about science. In such activities, children discover and experiment with materials and objects to understand scientific ideas and processes. Suggests that teachers should encourage children's curiosity. (BB)