A simple blind spot activity has been devised to help students discard misconceptions about image formation by lenses. Our hands-on experiment, in which students determine the location and size of their blind spots, is suitable for various age groups at different educational levels. The activity provides an opportunity to teach students how to…

Health educators play a key role in assisting the nation deal with and be prepared for potential biological attacks. This article summarizes information found in the literature about likely bioterrorist threats to the U.S. population and discusses the responsibilities of health educators in regard to these threats. Among the important roles health…

We present and discuss three examples of misapplication of the notion of conditional probability. In each example, we present the problem along with a published and/or well-known incorrect--but seemingly plausible--solution. We then give a careful treatment of the correct solution, in large part to show how careful application of basic probability…

Prior research has shown that students consistently overestimate their performance on academic exams, with the error being inversely related to their grades. The effect has been explained as a matter of competency. If true, then students who do not know what they do not know are put in a double bind. They do not have the cognitive ability to…

According to Alan Slonsom, "Mathematics without proof is like brandy without alcohol: the spirit of the subject is missing." This author relates how she became motivated to pick proof as an exciting topic to teach. It is important to distinguish between the usage of the word "proof" in everyday life and its meaning in a mathematical context.…

Purpose: This research note discusses a common misconception in speech science and speech-language pathology textbooks that rib torque (i.e., "rotational stress") assists resting tidal expiration and conversational speech production. Method: The nature of this misconception is considered. Conclusion: An alternate conceptualization is offered that…

In the commentary provided by Taskin (2006), he states that the authors' study did not provide valid information regarding the research sample. Taskin implies that it is therefore difficult to generalize findings of this study to Turkish elementary and middle school students. In this article, the author states that in their paper they provide…

This article illustrates the misconceptions that students have when using the equals sign and describes a lesson used to give students the foundation for an accurate conception of equivalency.

Several myths have grown up around problem solving as a result of the manner in which problem solving has traditionally been taught in schools. These myths are harmful to children, they affect curriculum decision of teachers, distort discussions about problem solving and undermine the mathematics reform movement in general.

A historical fact is like a fata morgana, "always less than what really happened." Even consensus does not establish truth; otherwise history is merely the version of the past that people agree to accept. The students who participated in the acclaimed 5th Street Cemetery Necrogeographical Study innocently found themselves clashing with…

Objective: To assess nutrition knowledge and dietary behaviors of seventh graders in nine randomly selected middle schools in Louisiana. Methods: This descriptive study used personal data assistants (PDAs) to administer a pre-validated questionnaire developed from national instruments to 127 seventh grade students from nine randomly-selected…

Australia continues to face teaching shortages in rural schools. Indeed, preservice teachers may be reluctant to apply for rural teaching positions, particularly as most have had no rural teaching experiences. What may motivate non-rural preservice teachers to seek employment in rural schools? This study investigates 17 preservice teachers' first…

In recent years a number of reports have raised alarm over the deteriorating state of U.S. science and technology (S&T) competitiveness. But a recent report by the RAND Corporation, "U.S. Competitiveness in Science and Technology," argues that the U.S. continues to lead the world. RAND's report has been interpreted to suggest that the "clarion…

The aim of this study was to investigate effectiveness of PDEODE (Predict-Discuss-Explain-Observe-Discuss-Explain) teaching strategy in helping students make sense of everyday situations. For this, condensation concept was chosen among many science concepts since it is related to many everyday-life events. Forty-eight eleventh graders students…

With universities, teacher education institutions, and high schools gearing up heavily in online course delivery in every discipline, science educators specifically are asking themselves "How do we provide this access to our students and still maintain our pedagogical integrity in science instruction?" This question seems to be at the heart of a…