Top500 Supercomputer Sites
Twice a year, the Top500 Project releases a list of the 500 sites with the most powerful supercomputers. The purpose of the list is "to provide a reliable basis for tracking and detecting trends in high-performance computing." The latest version was unveiled in June, and this site examines some of the most important developments and newcomers to the list. Most important is the recently constructed Earth Simulator in Japan, which was rated almost five times more powerful than second place. Additi
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America's Backyard: Exploring Your Public Lands
America's Backyard: Exploring Your Public Lands is the featured topic of National Geographic's Geography Action! -- an "annual conservation and awareness program designed to educate and excite people about our natural, cultural, and historic treasures." This Web site offers a number of public land-related educational activities, many of the which apply directly to the life sciences. Activities are available for grades K-12, and cover such topics as the role of forests in our daily lives, conserv
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probeBase
The Microbial Ecology Group of Munich's University of Technology has recently launched probeBase, "a comprehensive database containing published rRNA-targeted oligonucleotide probe sequences, DNA microarray layouts and associated information." Users may search for sequences by target organism, which "can assist in the development of new rRNA-targeted oligonucleotide probes for fluorescence in situ hybridization (FISH)," or by probe name for rapidly retrieving published probes targeting desired s
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Amazing Earth Games: Disasters You Can Play at Home
Another above average offering from Discovery.com, the Amazing Earth Games: Disasters You Can Play at Home Web site does a great job at making learning fun. The interactive activities include: Crumble California, in which users get to see how the continental plates have affected the state; Unleash a Superstorm, which lets you create your very own hurricane; and the Destroy Life on Earth activity, which gives you the power to launch fireballs at our planet and witness the result. A great site for
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Japanese Ant Image Database
The 2003 revised edition of the Japanese Ant Image Database was developed under the direction of the Japanese Ant Database Group (JADG). The website, which merges taxonomic information and stunning photographs, will no doubt delight myrmecologists and others. Information about different types of ants can be accessed through browseable, hyperlinked lists organized by subfamily, genus, and species. Genus and species profiles include images, references, descriptive information, simple distribution
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Atlas of the Breeding Birds of Ontario
Hosted by Bird Studies Canada, this site contains an online version of the _Atlas of the Breeding Birds of Ontario_, a publication based on information collected between 1981 and 1985 involving "the efforts of over 1,300 volunteers who collectively carried out more than 180,000 hours of field work." The Atlas was published in 1987 by the Long Point Bird Observatory and the Federation of Ontario Naturalists. The site is nicely laid out with a hyperlinked Table of Contents which connects visitors
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Urban Wildlife
The city is often characterized as the antithesis of wilderness. At the same time, many urban areas are home to large populations of various wild animals. In an effort to learn more about the animals living in our midst, this Topic in Depth takes a look at websites concerned with urban wildlife. The first (1) site, from Urban Wildlife Rescue, briefly describes problems related to trapping and relocating wild animals. The site also offers Humane Eviction suggestions for squirrels, foxes, raccoons
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systems of linear equations
Solve a system of linear equations by graphing and finding the intersection of the lines of the equations. Create a system of equations, examine its graph, matrix, and table of values, and determine the solution of the system.
Author(s): ExploreMath.com,Brian Sharp

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Copyright 1999-2001 ExploreLearning.com All Rights Reserved.

Compound Independent Events
Compare the theoretical and experimental probabilities of compound independent events by drawing colored marbles from a bag. Record the results of successive draws with or without replacement of marbles to calculate the experimental probability.
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The secret life of the brain
This web site was developed to accompany the PBS television series The Secret Life of the Brain, which explores how the human brain develops and changes from infancy through late adulthood. Among the site's features are a timeline of human knowledge of the brain, an interactive three-dimensional brain model, and illustrated descriptions of various brain scanning techniques. There are also sections devoted to each episode of the TV series that provide an overview of the episode, brief video clips
Author(s): David Grubin Productions,Thirteen/WNET New York

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Copyright 2001 Educational Broadcasting Corporation and David Grubin Productions, Inc. All rights reserved.

Weather in Antarctica
This homepage includes information about the weather in Antarctica and links to pages on the climate, wind chill, clouds, snow and ice, and pressure and storms of Antarctica. The current weather conditions updated automatically at various stations are also provided.
Author(s): Thomas Hutchings

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Antarctic connection.com

LEARN
LEARN was created to increase middle school science teacher knowledge of and interest in the atmospheric sciences. The original project began in 1991 with funding from the National Science Foundation (NSF). Much of the instructional and science content foundation for the LEARN workshops came from the teaching modules developed by LEARN teachers in collaboration with more than 60 National Center for Atmospheric Research (NCAR) scientists. The modules (Ozone in Our Atmosphere, Atmospheric Dynamics
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Copyright 2000-2001 University Corporation for Atmospheric Research. All Rights Reserved.

Perimeter explorer
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
Author(s): Shodor Education Foundation

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Copyright 1997-2004 The Shodor Education Foundation, Inc.

Science Sampler : Hypothesis-based learning
Are visions of students hypothesizing, designing experiments to test their explanations, analyzing data, writing formal publications of results, and debating over scientific procedures in an attempt to justify their control of variables dancing in your head? This dream can become a reality when you implement hypothesis-based learning (HBL) into your science curriculum. Follow the suggestions found in this article to put your dream in motion, and wake-up to a classroom teeming with motivated, on-
Author(s): Kaley Fore

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Permission to reproduce content is granted in advance under the following circumstances: (1) All educators may reproduce up to five copies of an NSTA article for personal use only. This does not inclu

All About Sea Ice
Launched by the National Snow and Ice Data Center, the All About Sea Ice website is designed as an introduction to sea ice: what it is, how it forms, how it is studied, how it affected historical expeditions in the polar regions, and what role it plays in the global climate. The site contains over 80 pages of information on sea ice, including a glossary of sea ice terms and links to more information. The primary focus of the site is as a resource for the general public, educators and students in
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Users may download and use any imagery or text from our web site unless it is specifically stated that the information has limitations for its use. We ask that the use of any imagery, text, or data ac

Reading online
This informational piece, part of a series about the future of energy, introduces students to a four-stage process for reading material online. The process includes getting started, reading, rereading and reviewing, and finishing. Each stage comes with a student tip sheet to enable students to work through the processes in a step-by-step manner. Students examine, summarize, review, and then use their new information. A graphic organizer provides students with an opportunity to evaluate the infor
Author(s): Iowa Public Television. Explore More Project

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Copyright 2004, Iowa Public Television

National Oceanic and Atmospheric Administration : Climate Homepage
This National Oceanic and Atmospheric Administration website provides climate information and data. This site offers a variety of product links to climate monitoring, climate at a glance data, U.S. drought assessment, global climate change information, weather observation stations and more. Users can also link to organizations which participate in climate research such as the National Climate Data Center, Ocean Climate Laboratory and the National Weather service. This site is an excellent resour
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These World Wide Web pages are provided as a public service by the National Oceanic and Atmospheric Administration. Information presented on these pages is considered public information and may be dis

Box plot (grades 6-8)
This virtual manipulative enables students to construct box plots to summarize data. Students enter data into a table, and the manipulative displays the minimum and maximum data values, the lower and upper quartiles, and the median. The number in the data set, the average, and the standard deviation are also shown. In addition, the manipulative allows users to order the data. Instructions for using the manipulative, suggestions for classroom use, and a link to the standard for data analysis and
Author(s): Utah State University. National Library of Virtual

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Copyright 2003 MATTI Associates LLC. All rights reserved.

Valley Springs Snow Cream
Middle School, difficulty level 2. Compare the volume of a sphere, cone, and cylinder using ice cream.
Author(s): Math Forum,Kelly Crisp

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Cups and Volume
How can I calculate the volume of a box, if I know how many cups of rice fill it? And how can 2 cups be a volume measure?
Author(s): Math Forum,Kedra

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