Presents a brief overview of allelopathy, or "chemical warfare" among plants. Includes suggestions for school science topics of study and activities. (Contains 11 references.) (Author/WRM)

Describes an investigation of the effectiveness of a role-play activity used to help secondary science students learn about color subtraction. Finds that pupils were better able to understand the abstract scientific concepts after the activity. (Author/WRM)

Describes the use of a creationist-derived lesson plan in a nonmajor zoology class to demonstrate students' grasp of scientific concepts and principles. (WRM)

Mathematically explains why the range of a projectile is most insensitive to aiming errors when the initial angle is close to 45 degrees, whereas other observables such as maximum height or flight time are most insensitive for near-vertical launching conditions. (WRM)

Uses the story "The Life of a Drop of Water" to initiate a creative writing activity and teach about the water cycle. Attempts to stimulate students' understanding of a scientific concept by using their imaginations. (YDS)

Imaging and other scientific instruments in space can reveal mysteries of the universe that reach far beyond any distance that would ever be practical for human space travel. As far back as the 1600s, Galileo used the crudest possible telescope technology to see the largest moons of Jupiter. The secret to making telescopes better is to make their…

Assessing students' knowledge is complex. Ideally, an assessment measures what students know about a given construct. Too often, however, assessments are complicated by miscommunication. Miscommunication occurs when students misinterpret the intent of the teacher's question and/or the teacher misinterprets the students' answers. This article…

The development of the concept of matter was explored by interviewing 84 children aged 3-13 in Slovenia. Children were asked to describe objects and substances placed in front of them. Children's responses were coded and explored for patterns indicating development with age. The patterns of responses indicate that by acting on objects and…

Most of teachers are familiar with the 5-E model of science instruction-engage, Explore, Explain, Expand, and Evaluate (Trowbridge and Bybee 1990). It is a valuable tool that allows teachers to structure science experiences so students use the processes of scientific inquiry to construct and connect ideas rather than simply memorize seemingly…

One of the most difficult jobs of elementary school teachers is teaching science for conceptual understanding. Conceptual understanding requires students to organize facts and ideas into a meaningful concept in science. Facts and concepts form webs that can help students make connections between the concepts of science and their experiences.…

This paper deals with a number of conceptual and theoretical issues that underlie the proposal to employ narrative explanations in science education: What is narrative? What is explanation? and What is narrative explanation? In answering these questions, we develop a framework of narrative elements and characteristics of narrative explanations.…

The process of construction of meanings for the concepts of concentration and neutralization is explored in terms of "contextualizing practices" (Lemke, 1990, "Talking Science. Language, Learning and Values," Norwood, NJ: Ablex) creation of meanings through connections established among actions and their context. This notion is expanded to include…

This article examines how the Dual-Situated Learning Model (DSLM) facilitates a radical change of concepts that involve the understanding of matter, process, and hierarchical attributes. The DSLM requires knowledge of students' prior beliefs of science concepts and the nature of these concepts. In addition, DSLM also serves two functions: it…

A long-standing and continuing controversy exists regarding the role of induction and deduction in reasoning and in scientific inquiry. Given the inherent difficulty in reconstructing reasoning patterns based on personal and historical accounts, evidence about the nature of human reasoning in scientific inquiry has been sought from a controlled…

Student preconceptions are one of the greatest challenges facing science teachers. Students will often hold on to their explanation even after being told the correct explanation. They need to be challenged with experiences that they can not explain using their existing models of the world in order to see real change in their preconceived notions.…