Maal- en deeltafel van twee, drie, vier, vijf en tien
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Met dit werkbad kunnen leerlingen de maal- en deeltafel van twee, drie, vier, vijf en tien inoefenen.


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IBM: Programming and Poetry
This article reviews a Poetry vs. Programming panel sponsored by IBM to continue a 2004 discussion from the Innovation Days speaker series. Panel participants, which included poets Thomas Lux and Vijay Seshadri, and IBM researchers John Richards, Josh Scribner and John Vlissides, discussed whether or not "writing code is like writing poetry." The panel was also broadcast to IBM's U.S. labs. The author provides quotes from the participants and describes the conversation as “lively and dynamic.”
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THE BOOK: An Engineer's Guide to the Digital Transition
This online guide was written to help engineers make the transition from analog to digital designs and implementations, with a specific focus on audio and video systems. The material is quite extensive and includes a wealth of application notes and "information on video formats, standards and interconnection considerations." Everything from high-level system design to proper routing techniques for different kinds of cables and signals is covered. The success of this guide prompted the creation o
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Ocean World: Coral Reefs
Texas A&M University presents Ocean World, a Web-based educational resource for oceanography. The feature on coral reefs has the most direct life sciences application, with easy-to-navigate sections about the coral animal, coral reefs as the rainforests of the sea, symbiosis, ecosystem services, and coral reef threats and conservation. The Web site also includes a handy hypertext glossary, an interactive quiz, and annotated links to interesting Web sites, including sites that provide real-time r
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The Pherobase
The Pherobase was developed by Dr. Ashraf El-Sayed, a research scientist at HortResearch in New Zealand, with the primary objective of providing "coverage of the literature published on chemical communication in insects." The Pherobase is intended for use by both scientific and non-scientific communities and currently contains "over 10000 entries, around 3000 molecules, and over 32000 static html pages that make it the world's largest database of behavior modifying chemicals." The site contains
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Floods: The Awesome Power
A newly released publication from the National Oceanic and Atmospheric Administration, the National Weather Service, and the Red Cross is entitled "Floods: The Awesome Power." The citizen-focused sixteen-page preparedness guide explains "flood-related hazards and suggests life-saving actions you can take." Readers will learn what flash floods are, what to do if you’re caught in your vehicle during a flash flood, what river floods are, how tropical cyclones create floods, where to get current we
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History of Energy
This latest Topic in Depth delves in the Web�s offerings on the history of energy. The first site is maintained by the US Department of Energy, which is called Milestones in the History of Energy and Its Uses (1). From fire to the discovery of nuclear energy, the site gives short descriptions on significant events in the history of energy for each century, events by particular fuel type, events by energy uses, how energy uses have changed, energy consumption changes, and more. The next site
Author(s): Brieske, Joel A.

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NSTA Webwatchers' Science Guides
The Webwatchers' Science Guides website -- provided by the National Science Teachers Association -- is a portal to educational resources on the Internet. Along with carefully selected links, this website offers a few downloadable lesson plans, as well as audio reviews from fellow teachers and vignettes demonstrating how to use the Guides in the classroom. Navigation can be somewhat tricky -- the site follows an elaborate organizational scheme that requires its own 4-page explanation. For a quick
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Learning and Teaching Scotland: Connected
Connected is an online magazine published by Learning and Teaching Scotland, "a national public body which provides guidance and support for teachers, school managers, local authorities, parents and others involved in education in Scotland." The articles featured here focus on ways to use information and communications technology (ICT) in learning, teaching and community development. The current issue is on 'New Teachers and ICT', and includes articles written by new and student teachers, report
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Jantar Mantar: The Astronomical Observatories of Jai Singh II
This website, created by the Cornell University Professor of Art, Barry Perlus, presents the five astronomical observatories in west central India. After reading a short introduction to the observatories, users can explore interactive panoramas of the observatories, built in the 18th century, using QuickTime. The website also offers still images and animations of the Samrat Yantra. Visitors can learn about the latest design plans and additions to the website. The website features downloads of ar
Author(s): Perlus, Barry.

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The Meteoritical Society
"The Meteoritical Society is a non-profit scholarly organization founded in 1933 to promote the study of extraterrestrial materials and their history." The website provides the latest Society news and downloads to its annual newsletter and bulletins. Scientists can find out about upcoming meetings and workshops, Society publications, and membership opportunities. Students and educators can locate materials describing meteorites, tektites, dust, and lunar samples as well as links to outside educa
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The Mission-A Great Scientific Adventure
At this interactive website, enhanced by Macromedia Flash Player, students can perform 19 creative scientific missions, including three super-missions. The missions include interesting clues, fun games, and stimulating quizzes. Users obtain chemical elements as an award for each mission they successfully complete with the ultimate goal of filling the Periodic Table. Through the activities developed by the National Film Board of Canada (NFB), students can learn about lightening, cloud types, elec
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Hawaii Coral Reef Assessment and Monitoring Program: Bibliographic Database
This coral reef-related Bibliographic Database was developed by the Hawaii Coral Reef Assessment and Monitoring Program (CRAMP). CRAMP conducts research "designed to identify the controlling factors, both natural and anthropogenic, contributing to the stability, decline, or recovery of Hawaiian reefs. The CRAMP "Bibliographic Database contains listings for published and unpublished documents concerned with the coral reefs and inshore marine resources of Hawaii." More than 2,500 references are cu
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Ocean's Alive!
Presented by the Museum of Science, Boston, the Ocean's Alive Web site takes a look into the fascinating world of oceans. The Water Planet link has information about the physical features of oceans, how they've been created, the water cycle, and ocean profiles. Other links explain ocean currents, winds and waves, tides, life in the sea, and scientists who study the oceans. The site contains good and easy-to-read descriptions, along with unique and interesting illustrations that make it fun to ex
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How high? : geometry (grades 6-8)
With this virtual manipulative, the student investigates conservation of volume with a virtual simulation of pouring a liquid from one container to a container of the same shape, but of a different size. There are four cylinder shapes to choose from: rectangular prism, cylinder, cone, and pyramid. The left container is partially filled with liquid and the base dimensions of the two cylinders are given. The student uses a slider to estimate how high the liquid will rise when poured into the secon
Author(s): Utah State University. National Library of Virtual

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Copyright 2003 MATTI Associates LLC. All rights reserved.

Using technology to support Limited-English-Proficient (LEP) students' learning experiences
This article examines the challenges and rewards related to using technology as a tool to increase learning for limited English-proficient (LEP) students. The article is based on the belief that students' content, linguistic, and technology skills should be developed in tandem. Strategies and standards for technology use are featured along with suggestions for enhancing LEP students comfort level in content classes. Access and equity and the redefinition of teacher roles are also discussed. Impr
Author(s): Asta Svedkauskaite,Laura Reza-Hernanadez,Mary Clif

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Copyright North Central Regional Educational Laboratory. All rights reserved.

An Earth Science Scrapbook Project as an Alternative Assessment Tool
Scrapbooking is a popular hobby and as such, has found its way into educational settings, primarily in middle and elementary school levels. This article describes a scrapbook project that is used both as a means of demonstrating the connections between geology and students daily lives and as an alternative form of assessment. The project was developed for an introductory Earth Science class for middle school and high school pre-service teachers.
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We encourage the reuse and dissemination of the material on this site for educational, noncommercial purposes as long as attribution is retained.

Healthy proteins from the evil weed
This article discusses how a genetically modified version of the tobacco plant offers the promise of a new method for manufacturing therapeutic proteins that is both inexpensive and safe.
Author(s): Sean Henahan

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All material on this website is protected by copyright, Copyright 1994-2005 by Access Excellence the National Health Museum.

How to obtain particles to accelerate
Where do the particles come from that are accelerated in a particle accelerator? In this portion of a particle physics tutorial, three sources of particles are described for students. The first source is electrons, which come from heated metals. The second is protons, which are available from ionized hydrogen. Antiparticles are the third source. They are collected by magnetic fields after particles smash targets. Copyright 2005 Eisenhower National Clearinghouse
Author(s): Lawrence Berkeley National Laboratory. Particle Da

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Copyright 2002 by the Particle Data Group.

Whats It Like Where You Live? Desert
This site provides excellent background information on deserts. Large print and superb pictures make this site very appealing to younger students. Topics include: What is a Desert Like?, Types of Deserts, What causes Deserts?, Deserts of the World, Desert Plants, Desert Animals, and links to other desert sites.
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Copyright 2002, Missouri Botanical Garden