Challenges exist in implementing science programs in indigenous schools where cross-cultural boundaries between students and teachers are small but teachers do not have formal science education and how to teach science in an indigenous language. This paper presents a model for teaching science within a 'wharekura' (indigenous secondary school) to…

What is friction? Like gravity, friction is a type of force. In simple terms, friction is, by and large, resistance to movement when two or more objects slide past one another. In this task young people are challenged to build a "buffer" to stop a moving ball using only a piece of ordinary A4 paper or a strip cut from it; that is,…

In this article the authors share a great activity for teaching the nature of science (NOS). Using a simple Amish pull toy to encourage a high school chemistry class to think about NOS, the authors realized that the activity not only highlighted scientific practices emphasized in the "Next Generation Science Standards" (Achieve Inc.…

People depend on plants to fulfill many of their basic needs, such as food, clothing, and shelter. Although plants are all around us, people are often afflicted with "plant blindness," paying more attention to animals (Wandersee and Clary 2006; Wandersee and Schussler 2001). Studying seed banks and building one in the classroom can…

A revisitation of the classical "mushroom cloud" demonstration is described. Instead of aniline and benzoyl peroxide, the proposed reaction involves household chemicals such as alpha-pinene (turpentine oil) and trichloroisocyanuric acid ("Trichlor") giving an impressive demonstration of oxidation and combustion reactions that…

In this paper an experiment to study Planck's radiation law is presented. The spectra of a heated furnace and of a halogen lamp under various conditions were measured with a small USB grating spectrometer and fitted using Planck's law. The temperature determined from the fit was then compared with the results of comparative temperature…

Catt's anomaly is a sort of "thought experiment" (a "gedankenexperiment") where electrons seem to travel at the speed of light. Although its author argued with conviction for many years, it has a clear and satisfactory solution and it can be considered indubitably just an apparent paradox. Nevertheless, it is curious and…

Practical experience is vital for promoting interest in science. Several aspects of chemistry are rarely taught in the secondary school curriculum, especially nuclear and radiochemistry. Therefore, we introduced radiochemistry to secondary school students through positron emission tomography (PET) associated with computer tomography (CT). PET-CT…

In this activity for the beginning of a high school Biology 1 evolution unit, students are challenged to reconstruct organisms found in an owl pellet as a model for fossil reconstruction. They work in groups to develop hypotheses about what animal they have found, what environment it inhabited, and what niche it filled. At the end of the activity,…

Measurements are presented on the rise of a spinning egg. It was found that the spin, the angular momentum and the kinetic energy all decrease as the egg rises, unlike the case of a ballerina who can increase her spin and kinetic energy by reducing her moment of inertia. The observed effects can be explained, in part, in terms of rolling friction…

Pressure increases rapidly with depth in a water body. Ocean and Great Lakes scientists often use this physical feature of water as the basis of a fun pastime performed aboard research vessels around the world: the shrinking of polystyrene cups. Depending on the depth to which the cups are deployed, the results can be quite striking! Capitalizing…

This paper reports on the contribution to biological knowledge of three different laboratory technologies and also endeavours to discover which technology students prefer the most. To examine differences in knowledge gained and learners' preferences for different technologies in biology laboratory work, we prepared three variants (triplets) of…

This study investigated the impact of a summer institute with follow-up coaching (treatment) versus no professional development (control) on middle and high school teacher and student science practice outcomes. Treatment teachers participated in a 2-week summer institute that used evidence-based professional development practices followed by…

"Transforming Science Assessment: Systems for Innovation," is a series of resources designed to provide state education leaders with: (1) Information about how states are currently pursuing statewide assessment systems in science; (2) Analyses of what features influence different approaches, with an eye to supporting state leaders as…

In an exploratory study, 36 South African physical science teachers' understanding of basic concepts concerning electric and magnetic fields was studied from a perspective of possible concept confusion. Concept confusion is said to occur when features of one concept are incorrectly attributed to a different concept, in the case of this study to…