This activity allows the user to measure angles and explore the concept of scale as it pertains to maps, images, and drawings.
This activity generates a stem and leaf plot from data that the user enters.
Native American Geometry
A physical, proportional geometry that originates from the simple circle. A growing body of architectural and iconographic evidence suggests this geometry was a relatively common tradition and has been practiced for at least 2000 years. The site is divided into four areas: Foundations, Anthropology, Designs, and Education; it introduces this two-dimensional non-random geometry in a connect-the-point format, exploring the intellectual and cultural implications of pre-Columbian geometric tradition
PET (Positron Emission Tomography) scans
Here is an overview of PET (polarized emission tomography), a brain scanning technique. The web page offers a description of how PET scans are conducted and an example of the kind of image they can produce. The science behind PET's ability to document levels of brain activity is also briefly addressed. As part of a set of materials about brain scanning technologies, this overview also points out how PET differs from earlier types of brain scans. Copyright 2005 Eisenhower National Clearinghouse
Fibonacci Numbers and the Pascal Triangle
Offered in English, German, and Serbian, this site is a good introduction to the mathematical concepts of Pascals Triangle, Fibonacci numbers, and the Golden Section. Because it is operated in Yugoslavia, there are occasional grammatical errors in the English version. Nevertheless, the information presented gives a valuable account of the significance of these topics. The content of the site includes historical perspectives (with brief profiles of the mathematicians who originated the ideas) and
Why Teach Bioethics?
Adolescents are passionately interested in ethical questions suggesting adolescence may be a critical period for including bioethics in science education. Knowledge arises when the mind interacts with content; an understanding of ethical issues develops as an evolving process around real-life situations. The question is what role should teachers play in the acquisition of this knowledge?
Create a Graph
Students will learn how to create area, bar, pie, and line graphs. They are provided with information about what each type of graph shows and what it can be used for. Students are given an example of each type of graph, but they can create graphs using their own data in the interactive tool.
Atlas of the Cyrosphere
This site from the National Snow and Ice Data Center (NSIDC) allows visitors to explore and dynamically map the Earth's frozen regions. Viewed from a polar perspective, the available data sources include snow cover, sea ice extent and concentration, glaciers, ice sheets, permafrost, and other critical components of the Earth's cryosphere. Users can zoom in to a specific region on the Earth as well as overlay country borders, major cities, and other geographic information. This site provides a ge
Quick take on factors
Factors and their multiples are so important to students in their work with fractions and number theory. These concepts come under the NCTM Numbers and Operations Standard for the middle grades. The online resources here are all hands-on, if only virtually. Important to their success is the classroom talk that the resources generate.
Royal Botanic Gardens, Kew : Information Sheets: Epiphytes - adaptations to an aerial habitat
Since epiphytes have no contact with the soil, the major difficulties they encounter are shortages of water and nutrients. Many have similar adaptations to desert plants, enabling them to collect, absorb and store water and restrict its loss. Some epiphytic mosses and lichens, in contrast, shrivel and stop growing when water is short, but when it becomes available they are able to absorb it rapidly and resume growth.
These pages, part of From Stargazers to Starships, explain electromagnetic waves and sunlight. Information inlcudes physiological and spectral color, spectral lines, the electromagnetic field work by Maxwell, the discovery of radio waves by Hertz, and photons and Einsteins relation. Stargazers also has detailed lesson plans accompanying these sections.
Sunlight and the Earth : Climate and Weather
These web pages trace the processes involved in the suns impact on weather. This is an exploration of the importance of radiation and reflection of light, both visible and infra-red, and the greenhouse effect. Convection and the role of water vapor are also considered. Global-scale air flows are described, explaining why wind in the continental US usually blows from the west, while near the equator it comes from the east.
National Centre for Biotechnology Education Genetically Modified Food
Following the recent decision of Bayer CropScience to withdraw its herbicide-tolerant fodder maize, Chardon LL, the soonest we are likely to see commercial cultivation of any GM crop in the UK is 2008 . This mini-site examines the history of GM food in the UK. This content is appropriate for teachers or as an extension.
Hot Colors- Windows into Hidden Worlds
This website contains an electronic field trip based on Yellowstone National Parks hot springs and the microorganisms living in them. The site includes a link for teachers providing an introduction, overview of concepts explored in the trip, lesson plans, and additional web links. The electronic field trip may be viewed in a low bandwidth version without downloading. For a high bandwith version of the field trip, Macromedia Flash Player is required and can be downloaded on site. Further informat
Waves and Wave Motion : Describing Waves
This module introduces the history of wave theories, basic descriptions of waves and wave motion, and the concepts of wave speed and frequency.
The Nitrogen Cycle : Of Microbes and Men
This module provides an overview of the nitrogen cycle and the chemical changes that govern the cycle. It includes explanations of how nitrogen is used by organisms and how humans effect the cycle.
Illuminations, National Council of Teachers of Mathematics Vision for School Mathematics
The National Council of Teachers of Mathematics Illuminations Web site is designed to illuminate the new vision for school mathematics as presented in NCTM s Principles and Standards for School Mathematics. The site provides online esources that will help improve the teaching and learning of mathematics for all students, from pre-school through high school.
This activity is designed to engage the student in an exploration of the perimeter of shapes formed by adjacent squares on a grid. After the student selects an area, the Java applet generates a closed figure with that area. The student enters the perimeter of the figure, and the answer is checked automatically. The applet limits figures to rectangles and generates two column comparisons of areas and perimeters for multiple figures. From the activity page, What, How, and Why buttons open pages ex
Science Sampler : Reading science
Nonfiction books have the power to excite students about learning and fuel their desire to know more about a topic or person. Using a variety of books can differentiate instruction and provide suitable reading to students at all levels and for almost any interest. This article provides a list of recommended reading and some lesson ideas that correspond with the material.
A Natural Fusion: Math and Science Across the Curriculum : Northwest Teacher, volume 4 number 1
Articles in this issue of Northwest Teacher focus on integrating math and science across the curriculum. Teachers create learning experiences for students, of all grade levels, that transcend the power of any one of them taught in isolation. With todays national spotlight on improving students reading and math skills, the potential for cross-disciplinary teaching of these subjects may be readily apparent. But science, too often nudged to the hinterlands of the curriculum when state standards and