The water cycle is a large, complex system that encompasses ideas across the K-12 science curriculum. By the time students leave fifth grade, they should understand "that a system is a group of related parts that make up a whole and can carry out functions its individual parts cannot" and be able to describe both components and processes…

Many educators have utilized the phenomenon of the so-called "hydrostatic paradox" to actively engage students in classroom instructional activities related to hydrostatic equilibrium. Various approaches requiring different levels of mathematical knowledge have been proposed in the literature to provide students clear explanations of…

Many icebergs are vulnerable to capsizing. In doing so the gravitational potential energy of the ice is increased, while that of the displaced sea water is decreased. Applying the principle of the conservation of energy shows that by capsizing, there is also a net transfer of energy to the surrounding sea water. This will be a maximum for a…

Three decades ago, Stephen Kemmis (1990) argued that curricula provide insights into how nations and states interpret themselves and how they want to be interpreted. He also noted that 'debates about curriculum reveal fundamental concerns, uncertainties and tensions which preoccupy nations and states as they struggle to adapt to changing…

This paper arises from research undertaken by educational semioticians and science educators investigating the use of student generated digital artefacts as assessment tasks in pre-service science teacher education. Part of a broader shift toward student-generated media in tertiary science, the use of such tasks is driven by the need to deepen…

This article focuses on the relationships between social justice, environmental justice, and sustainability from the local to global levels. We envision social and environmental justice as involving not only human beings, but also the rights of all species to life and respect. We advocate an ecological justice approach based on the equality and…

The author waits in the hot and oppressive air while dust devils are born and die over the newly plowed field. It is a dry spring and she prays for rain. The lupine beans withered to dry threads last week and the corn that sprouted in a green haze over the north field is turning to brown paper. However, driving north, the author discovers the Rum…

In this study, we investigated how high school credit recovery students worked in small groups and used computer-based scaffolds to conduct scientific inquiry in a problem-based learning unit centered on water quality. We examined how students searched for and evaluated information from different sources, and used evidence to support their claims.…

Framed by a social practice perspective, this article presents a theoretical, political, and practical rationale for implementing and expanding water, sanitation and hygiene education (WASH) in preschools throughout the world. Every day thousands of young children die, while others suffer serious illness or stunting from water-, sanitation-, and…

The present article analyzes the comparative characteristics of the recreational potential of hydro areas of the Republic of Kazakhstan. 20 hydro areas were marked out for comparative assessment of their attractiveness and recreational possibilities of the development of medical health tourism on the basis of balneological resources. The aim of…

National elementary science standards have included the teaching of systems for decades, however little is known about teachers' understanding of complex systems. This study focuses on how elementary pre- and in-service teachers understand and apply "systems thinking" to the water cycle. Teachers completed the Water Cycle Diagnosis Test…

Micrometeorites originate from small pieces of rock from space colliding with the Earth's atmosphere at high velocity, such as the Perseid meteors which hit the atmosphere at 60 km/s. When they do so, they burn up, causing a flash of light that we see as a meteor. Many groups have been successful collecting these particles using various devices.…

A fun activity is presented using singing wine glasses for introductory physics students. Students tune a white wine glass and a red wine glass to as many semitones as possible by filling the glasses with the appropriate amounts of water. A smart phone app is used to measure the frequencies of equal-temperament tones. Then plots of frequency…

The global effort to achieve sanitation and water for all by 2030 is extending beyond the household to include institutional settings, such as schools, healthcare facilities and workplaces. This has been reinforced by global education for all strategies highlighting how water, sanitation and hygiene (WASH) in schools improves access to education…

We describe a 2 h introductory laboratory procedure that prepares a novel magnetic antimicrobial activated carbon nanocomposite in which nanoscale sized magnetite and silver particles are incorporated (MACAg). The MACAg nanocomposite has achieved the synergistic properties derived from its components and demonstrated its applicability as an…