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Arithmetic and Algebra
More than 110 games or puzzles having to do with arithmetic or algebra, with extensive discussions and solutions. Most require a browser capable of displaying JavaScript or Java.
Author(s): Math Forum,Interactive Mathematics Miscellany and

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El Nino Returns
This web page is an online companion to CNN's special coverage on El Nino for the 1997-98 season. El Nino is a strange but powerful weather phenomenon; tracker and background reports provide the user with the science behind El Nino, its history and impact. Topics covered include: forecast; ground zero (Peru); strange brew (weather); prediction meter; the wet coast (California); and the trackers. Links to other web sites are provided, and users may access more up-to-date El Nino stories by clicki
Author(s): Associated Press,Chris Kline,Jim Moret,Joie Chen,L

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Copyright 1997 Cable News Network, Inc. All Rights Reserved.

Science Friday Online!
This is an online companion to Science Friday, a weekly science, technology, and environment news radio program. The site includes articles about the weekly program, video, and blog links. A podcast of the program is also available.
Author(s): Creator not set

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Matter: Atoms from Democritus to Dalton
This web page provides an overview of atomic theory from Democritus to Dalton and reviews John Dalton's 4 basic theories on matter. The page is also available in Spanish.
Author(s): Creator not set

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For educational use per the terms and conditions described in the Visionlearning, Inc. terms of use statement found at http://www.visionlearning.com/docs/terms.php

Sketches of the history of Electromagnetics
This website outlines the history of light, electricity, magnetism and electromagnetic theory, placed in a linked timeline order with corresponding biographical sketches. It includes events from antiquity to 1933.
Author(s): Jeff Biggus

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Copyright, Jeff Biggus: hyperjeff@mac.com

Salt of the Early Earth
This astrobiology news article analyzes the role salt played in the evolution of life on Earth. It explains why scientists have long assumed that life originated in the sea and describes the history of water on Earth in relation to the origin of life. Leading scientists contribute information about the significance of anaerobes, halophiles, methanogens, and the depositional environments of sedimentary rocks that hold Precambrian microfossils. They also suggest that we should extend our search to
Author(s): Creator not set

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Copyright 2009, Astrobio.net

Adding It Up: Helping Children Learn Mathematics
Adding it All Up explores how students in pre-K through 8th grade learn mathematics and recommends how teaching, curricula, and teacher education should change to improve mathematics learning during these critical years. The committee identifies five interdependent components of mathematical proficiency and describes how students develop this proficiency. With examples and illustrations, the book presents a portrait of mathematics learning: Research findings on what children know about numbers b
Author(s): Mathematics Learning Study Committee, National Res

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Metadata is copyrighted by the National Academy of Sciences, 2005. NSDL may modify, reformat and redistribute metadata to function within NSDL systems, services and partners. Resource terms of use: Co

Teacher's Toolkit : Two-tiered assessment
Developing good instruments that can be used to assess what students really know about scientific content is one of the most difficult tasks facing teachers in middle school classrooms today. However, two-tiered tests can be an effective solution to this increasing problem. Two-tiered tests are written assessments that not only ask students for an answer to a problem, but also require students to explain the reasoning behind their answer.
Author(s): Victor Sampson

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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

Water reclamation plant
In this video clip, students see how wastewater is treated at a water reclamation plant. One of the plant's operators gives Bob the Vid Tec (a children's programming host) a tour of the plant, describing along the way what happens at each step in the water treatment process. For example, the operator explains that microorganisms are used to consume human waste in the biological nutrient removal step. Bob also talks with another plant operator about why kids should learn about wastewater treatmen
Author(s): Johns Hopkins University. Center for Technology in

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Copyright Maryland Public Television and Johns Hopkins University Center for Technology in Education.

Science News For Kids
This resource is meant to enhance the usefulness of Science News in the middle-school classroom and offer recreational reading and activities for students interested in science. It is comprised of six zones: a weekly brainteaser for those who enjoy solving and inventing puzzles, entertaining science-fiction composition exercises for those interested in writing, and weekly science fair profiles and tips. The GameZone contains a small selection of logic and memory games, implemented as Java applet
Author(s): Creator not set

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Copyright 2003 Science Service. All rights reserved.

Molecular Clocks : Proteins That Evolve at Different Rates
From The Human Evolution Coloring Book by Adrienne Zihlman, four different proteins from humans and horses are compared in this graphic and article, and the reasons each protein evolves at its own characteristic rate are discussed. Each protein is useful for measuring evolutionary change over a different time scale.
Author(s): Creator not set

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The Human Evolution Coloring Book, Second Edition, by Adrienne Zihlman, produced by Coloring Concepts Inc. and published by HarperCollins, New York

Scope on the Skies : Convening with Comets
In February 2004, not only were the four brightest planets visible across the evening skies, but there was a comet rendezvous mission nearly completed while another was just getting started. Comet missions not only provide information about comets and their origins, but they also give us an important insight into the origins of our solar system. This month's Scope on the Skies column describes the Stardust spacecraft mission.
Author(s): Bob Riddle

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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

Quick take on stream ecology
Planning your spring units? Most kids (and their teachers) love to get into the field to do science. The activities provided here can stand alone or act as a complement to activities done with the assistance of department of natural resources personnel.
Author(s): Staff at the National Science Digital Library Midd

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Computer programmer
What do computer programmers actually do? This is the introductory page for a set of materials about computer programming as a career. Here the job of a computer programmer is defined and described. Computer programmers write and maintain computer software. In the rest of the resource, students can examine a specialized job title associated with computer programming: software developer. Students can view a six-minute video clip of the software developer as he works on writing software and debugg
Author(s): Iowa Public Television. School to Careers Project

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Copyright 2002, Iowa Public Television

Maths: Number : Short and long division
Worked examples of short and long division problems. For long division, an applet gives a step-by-step demonstration of the procedure; the pace at which the learner views each step is controlled by the user.
Author(s): Creator not set

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British Broadcasting Corporation 2002-2007

Observe solar eclipses
This Earth science animation helps students compare three types of solar eclipses: total, partial, and annular. The introduction explains how the type of eclipse is determined by variations in distance and alignment between the Earth, sun, and moon. The animation follows the events of all three eclipses concurrently. Movie controls allow students to repeat, pause, or step through the animation, which can give students more time to compare the eclipse sequences. Copyright 2005 Eisenhower National
Author(s): TERC. Center for Earth and Space Science Education

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See site for guidelines governing the use, restrictions and reproduction of these materials.

Water reclamation plant (RealVideo)
In this video clip, students see how wastewater is treated at a water reclamation plant. One of the plant's operators gives Bob the Vid Tec (a children's programming host) a tour of the plant, describing along the way what happens at each step in the water treatment process. For example, the operator explains that microorganisms are used to consume human waste in the biological nutrient removal step. Bob also talks with another plant operator about why kids should learn about wastewater treatmen
Author(s): Johns Hopkins University. Center for Technology in

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Copyright Maryland Public Television and Johns Hopkins University Center for Technology in Education.

Precession
About 2000 years ago the Greek astronomer Hipparchus discovered that the position of the Sun at any season, measured against the background stars, migrates in a slow cycle of about 26000 years. This precession of the equinoxes also shifts the position of the celestial pole (so that our pole star would not have been a good guide for the ancient Greeks) and is caused by the rotation axis of the Earth slowly moving around a cone. Precession may be one of several astronomical processes contributing
Author(s): David Stern

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Copyright Dr. David P. Stern

Warning Signs for Dangerous Times : Exploring the Use of Storm-Tracking Technologies
In this lesson, students explore the use of storm-tracking technologies, research how natural disasters are predicted, and assess the importance of these technologies. A case study of a New England snow storm and its impacts is presented for discussion, along with suggestions for retrieving information about forecasts as well as links to weather prediction and warning sites.
Author(s): Creator not set

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Copyright 2005, The New York Times Company.

Agricultural scientists
What are agricultural scientists, and what do they actually do? This is the introductory page for a set of materials about agricultural science as a career. Here the job of an agricultural scientist is defined and described. In the rest of the resource, students can examine two specialized job titles associated with agricultural scientists: organic specialist/assistant professor and senior research associate. Students can read narratives that are a few paragraphs in length about an organic speci
Author(s): Iowa Public Television. School to Careers Project

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Copyright 2002, Iowa Public Television

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