In this two-part activity, high school biology students examine human karyotyping, sex-chromosome-linked disorders, and the relationship between biological sex and gender. Through interactive simulations and a structured discussion lab, students create a human karyotype and diagnose chromosomal disorders in hypothetical patients, as well as…

The "Learn to Think" (LTT) Intervention Program was developed for raising thinking abilities of primary and secondary school students. It has been implemented in more than 300 schools, and more than 200,000 students took part in the experiment over a 10"year span. Several longitudinal intervention studies showed that LTT could…

"Inquiry" is a nearly ubiquitous part of recommendations for effective practice in school science worldwide. Teachers often experience difficulties, however, in engaging students in inquiry activities in which they are asked to explore physical phenomena (and energy) and, from their inquiries, derive appropriate conclusions about nature. It has…

Gram staining bacteria is a fundamental technique introduced in general biology and microbiology laboratory courses. Two common problems students encounter when Gram staining bacteria are (1) having a difficult time locating bacterial cells on the microscope slide and (2) over-decolorizing bacterial cells during the staining procedure such that…

We describe an experiment which enables the observation of longitudinal magnification for the real image of a three-dimensional (3D) object formed by a converging lens. The experiment also shows the absence of longitudinal inversion. Possible reasons for misconceptions with respect to real images and longitudinal inversions are discussed and a…

Energy is a valuable resource that comes in many different forms. In "Energy: 25 Projects Investigate Why We Need Power and How We Get It" kids ages 9-12 learn about the history and science of the world's sources of energy, from nonrenewable fossil fuels such as coal, oil, and natural gas to renewable energy sources such as solar and wind power.…

Engineering design has been suggested as a viable instructional approach for Technology Education (TE) to intentionally provide students the opportunity to apply multidisciplinary concepts to solve ill-defined design challenges (Wells & Ernst, 2012; Sanders & Wells, 2010; Wicklein, 2006). Currently, the context for design challenges in TE…

Biological evolution still lacks representation in school, especially below high school level. In order to find new implications that could help achieve significant improvement in teaching evolution, twelve expert interviews with both renowned researchers and experienced science teachers were conducted. Results of the comparison between the…

This longitudinal study examined the extent to which teachers' participation in a 3-year professional development program enhanced their self-efficacy and prompted changes in science instruction in the early elementary grades. The study used a mixed-methods design, and included 39 teachers who taught in kindergarten, first grade, or second…

New science standards and reform recommendations spanning grades K--16 focus on a limited set of key scientific concepts from each discipline that all students should know. They also emphasize the integration of these concepts with science practices so that students learn not only the "what" of science but also the "how" and…

The use of informal science education in rural areas, especially at rural middle schools has not been well documented. Although rural areas have accessible outdoor learning environments compared to urban areas, teachers are less likely to incorporate informal science activities. The purpose of this study was to evaluate two seventh grade life…

The purpose of this study is to design different hands-on science activities and investigate which activities could better promote female students' learning motivation towards science. This study conducted three types of science activities which contains nine hands-on activities, an experience scale and a learning motivation scale for data…

A pair of objects on an inclined plane are connected together by a string. The upper object is then connected to a fixed post via a spring. The situation is first analysed as a classroom exercise in using free-body diagrams to solve Newton's second law for a system of objects upon which many different kinds of force are acting (string tension,…

At a 5-day summer camp designed for middle-school girls (N = 50), fifth through ninth-grade students were able to identify with individual scientists and learn more about the science field. Data from the girls' journals, pictorial representations, and field notes demonstrated that these young women related to scientists who actively engaged them…

The call for inquiry science to be a part of the school science curriculum is popular in many parts of the world. While some research in this area revealed success stories of students' learning when they are engaged in student-directed, open-ended scientific inquiry activities, others are more sceptical about how these activities impact students'…