The Mexican American War
Conflict between U.S and Mexico started when Mexico insisted that its northern border lay along Nueces River, while U.S.claimed that it was farther south along Rio Grande. President Polk sent Zachary Taylor to the troubled area, but the two sides clashed and U.S. soldiers were killed, leading to Congress' declaration of war. The Mexican War gave U.S. more land, but led to more conflicts between free/slave states. This four minute video explains this and is accompanied by text to make it easier t
Contemporary Perspectives in Distal Radius Fracture Fixation
Wrist fractures, those injuries involving the distal radius, the distal ulna, and the joints about these bones, are some of the most commonly sustained fractures in any age group. With such a large number of injuries encountered, the effort to return patients to their normal activities has driven remarkable changes in treatment methods. UW physicians Matt Lyons, Jeffrey Friedrich, Douglas Hanel, and Jerry Huang discuss the history of wrist fractures and how the recently updated AAOS guidelines a
The Whyfiles Spring Break Edition: Bad News on Skin Cancer
You are unlikely to meet anyone these days who has never heard that UV radiation from the sun can cause skin cancer, but scientific inquiry into this unfortunate fact is far from over. This Whyfiles feature offers an in-depth explanation of the sun-skin cancer connection, beginning with a highly readable, explanatory introduction to UV radiation, forms of skin cancer, and the ozone layer. This background information sets the groundwork for the next section, an intriguing look at epidemiological
Teach-nology.com is "intended to bring educators into the world of teaching with technology...by providing links to valuable and useful information relative to current and best practices in the field of education." Visitors will find the links categorized by subject, including archeology, astronomy, chemistry, earth science, lesson plans, physics, sites to use with students, and several others. Each of these subjects then include several subcategories, listed along with brief descriptions of wha
Stem Cell Task Force
This Web site from the National Institutes of Health (NIH) provides an overview of the activities of an NIH task force established to move the stem cell research agenda forward. The section titled Scientific Research may be of particular interest to researchers in this area. It provides links to the Web sites of stem cell-related research at a number of NIH institutes, as well as an extensive information index, a FAQs page about stem cell research, information on funding opportunities, and much
Drilling for oil in the Arctic National Wildlife Refuge (ANWR) in Alaska has been a topic of debate for many years. Although initial exploratory drilling has not yet been authorized by the government, this site presents some technologies that could eventually be used to find and extract oil without damaging the land. Nine articles describe different drilling methods, spill prevention tactics, exploration techniques, and more. One topic is 3D reflective seismic technology, which is used to help a
Plants in Motion
Roger P. Hangarter of Indiana University's Department of Biology has created this wonderful collection of time-lapse photography that allows us "to see the movements of plants and clearly demonstrates that plants are living and capable of some extraordinary things. " The videos available show a broad range of plant growth phenomena, including germination, circadian responses, phototropism, and much more. The movies are fun to watch in and of themselves, but don't miss out on the informative desc
Since its inception over a half century ago, the Soil Association has "been working to raise awareness about the positive health and environmental benefits of organic food and farming and supporting farmers in producing natural food consumers can trust." Originally formed by a coalition of inspired scientists, nutritionists, and farmers, the Soil Association is now the leading organic farming and food certification and campaigning organization in the United Kingdom. Although primarily geared tow
The Messier Catalog
The Students for the Exploration and Development of Space of the University of Arizona maintains The Messier Catalog Web site. Named after the French astronomer who first discovered the objects, the catalog describes and features what are considered to be some of the most beautiful nebulae, star clusters, and galaxies in the sky. Visitors can read about Messier and about each individual object in the actual catalog, which includes a picture, its distance, brightness, the history of its discovery
Dialogue for Kids Wild About Bears Sleepy Bear Lesson Plan
Each winter, bears hunker down, slow their metabolisms, and pretty much wait out the winter in the safety of some sort of den. This lesson plan, from Idaho Public Television, is a fun way to illustrate to children (probably elementary grades primarily) the process of hibernation. At this site, educators are given the complete lesson plan instructions as well as several links to all sorts of great resources, including links to information on: Bear Diet, Home Range, Reproduction, Bear Research, Pe
Highlight of Biochemistry: Molecular Structures Made Visible
This Web site from the University of Hamburg Faculty of Biology offers useful three-dimensional images of molecular structures, many of them animated. The dozens of images included in this site should help visual learners understand molecular structure and function in a number of contexts, including virology, immunology, neurology, photosynthesis, genetics, and more. Detailed descriptions and related information accompany each image. This Web site also provides links to three tutorials covering
Insecta Inspecta World
Insecta Inspecta is the result of an interdisciplinary program at Thornton Jr. High School under the review of the Smithsonian's National Museum of Natural History. This Web site offers a fun way to learn about insects and other arthropods, and does a great job of placing these bugs in a larger cultural and historical context. In addition to providing a solid introduction to insects and arthropods, this site includes quirky trivia and entertaining audio and movie clips. For instance, visitors ca
Bing & Bong's Tiny Planet
The Bing & Bong's Tiny Planet website, a supplement to the educational television series, offers excellent science activities, games, and online books for small children. Users can sail around the planet to learn about wind, read an online story to discover space, take an adventure through the water cycle, and much more. Visitors can also learn the essentials of colors, shapes, and light through short videos and interactive modules. The colorful website offers a great way for children to begin l
Air pollution is a growing problem today. This lesson plan is designed to teach students about the problem, its effects on our environment and health and the latest methods designed to combat air pollution. The objectives of this lesson are (1) to define air pollution, (2) to identify major causes of air pollution (e.g., automobiles, burning garbage, electric power plants emissions, industrial boilers and certain consumer products), (3) to identify the effects of air pollution (health effects in
Teacher's guide to the infrared
This is a page from a larger website, Seeing our World Through a Different Light, sponsored in part by NASA. This page contains side by side standard and IR photos to illustrate how IR photos show heat. It describes and compares visible light and infrared light. An explanation, accompanied by photos, of how infrared cameras work is also provided.
Don't Crack Humpty
Student groups are provided with a generic car base. The groups then design a device/enclosure that will protect an egg on or in the car as it is rolled down a ramp at increasing slopes. Students will be expected to perform basic mathematical calculations using their data.
Absolute Beginner S2 #10 - Missing the Japanese Train
Learn Japanese with JapanesePod101.com! Your friends have never known you to be a person who is on time. In fact, they usually lie and tell you a different time so you aren’t running late! But now that you’re in Japan, you’re determined to change your tardy ways and stay on schedule. After you think for [...]
Hot Apps: Parachute Panic, Dog-A-Pedia, Hairdo For You, Chicks'n'Vixens, Soundtrckr Each week, Hot Apps will feature five of the hottest Windows Phone 7 apps. In this episode, Laura takes a look at: Please leave suggestions for hot apps that should be featured in the comments section, thanks!
Each week, Hot Apps will feature five of the hottest Windows Phone 7 apps. In this episode, Laura takes a look at:
Please leave suggestions for hot apps that should be featured in the comments section, thanks!Author(s):
The Structure of an Atom
The instructor, with the aid of a whiteboard, demonstrates the structure of an atom. (Although the title is "How to Find Electrons?", the instructor talks about an atom's structure.) (02:09)
Exercice 18 (Arithmétique dans Z)  (video)
Exo7. Exercices de mathématiques pour les étudiants.
Nombres premiers de la forme 4k+3.
Retrouvez la correction écrite sur http://exo7.emath.fr
Bonus (à 5'29'') : théorème de Fermat Euler, cryptographie RSA.
Exo7. Exercices de mathématiques pour les étudiants.
Nombres premiers de la forme 4k+3.