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Journal Article

Science Sampler: Representing Variability of Data

Measures of central tendency--mean, median, and mode--are often used as descriptive statistics when students conduct experiments in which they take repeated measures of the dependent variable or when class data are pooled for analysis. These measures...

Journal Article

Scope on Safety: The Eyes Have It, or Do They?

Laboratory accidents and near misses in schools are often caused by the lack of personal equipment, such as eye protection. Sophisticated acids and other corrosive chemicals are not the only substances that put eyes in jeopardy. A household item as s...

Journal Article

Watershed Investigations

Investigating local watersheds presents middle school students with authentic opportunities to engage in inquiry and address questions about their immediate environment in an interdisciplinary context. This article describes a collabortive project de...

Journal Article

Science 101: What's the difference between frogs and toads?

Frogs and toads belong to a group of Amphibians known as Anura (Latin for "without tail"). Though different on many levels, frogs and toads share some basic similarities. Here are the basic facts about these animal favorites....

Journal Article

Skateboards or Wildlife? Kids Decide!

Using the Internet to help solve real-life problems is a great way to make science learning relevant to today's students. In this project, students investigated "playas", temporary local wetlands, and surveyed their local school grounds as potential ...

Journal Article

Portfolios in Physics

Student attainment of all-important course goals is not easily measured by paper-and-pencil tests. Whereas portfolio assessment forces alternative ways of thinking by the teacher about what is done and what is measured. Portfolios also provide an imp...

Journal Article

Field Trip to the Moon

The main features of lunar geology are now fairly well known, perhaps better known than some aspects of terrestrial geology. This is not surprising—the Moon’s main internal activity stopped billions of years ago, unlike the Earth’s. This articl...