Science is always changing. Its very nature requires that scientists constantly revise theories to make sense of new observations. As they learn science, students are also constantly revising how they make sense of their observations, which requires comparisons with what they already know to process new information. A teacher can take advantage of…

When students enter the classroom, they often hold prior knowledge or conceptions about the natural world. These conceptions will influence how they come to understand what they are taught in school. Some of their existing knowledge provides good foundation for formal schooling, but other prior conceptions, however, are incompatible with currently…

Nearly 20 years after the release of The Harvard-Smithsonian Center for Astrophysics' video, "A Private Universe", much research has been done in relation to students' understanding of space-science concepts and how to effectively change these ideas. However, student difficulties with basic space-science concepts still persist. This article will…

Despite over 10 years of reform efforts, research still shows that students typically have inadequate conceptions of what science is and what scientists do. Many science students, as well as some teachers, use a single "scientific method" that, "proves a hypothesis" by systematic data collection. By following a prescribed set of steps, and writing…

Recommends ways that teachers can scrutinize and modify their science teaching to avoid student misconceptions by focusing on clarifying conceptions, analyzing understanding, and making changes. (YDS)

Uses a video, "A Private Universe", to introduce preservice teachers to students' alternative conceptions and the concept of conceptual change. (YDS)

Presents research on different techniques to determine the level of understanding among middle school students regarding the phases of the moon. Quotes student responses to provide some insight into students' level of understanding of general knowledge about the moon, moon phases, and modeling the phases. Presents implications for teachers. (KHR)

Uses student-constructed models to teach about the atom and its structure in order to achieve internalized understanding of the concept among students. (YDS)