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"These eight online games teach you the chemical elements, periodic table, and more. Just click to play and learn!"

FunBrain will show you a periodic table that contains the elements' symbols and their periodic numbers.

"Here's an article by BIE that appeared in the September 2010 issue of Educational Leadership magazine from ASCD. Good for general audiences as well as educators, it explains the essential elements that make rigorous PBL different from "doing projects.""

"The Story Map interactive includes a set of graphic organizers designed to assist teachers and students in prewriting and postreading activities. The organizers are intended to focus on the key elements of character, setting, conflict, and resolution development. Students can develop multiple characters, for example, in preparation for writing their own fiction, or they may reflect on and further develop characters from stories they have read. After completing individual sections or the entire organizer, students have the ability to print out their final versions for feedback and assessment. The versatility of this tool allows it to be used in multiple contexts."

"Project Essentials Checklist The Project Essentials Checklist could be used for a quick evaluation of a project's design, to see if it includes all the essential elements of rigorous, effective PBL."

Lighting is one of the most important elements of any picture, and understanding the color, direction, quantity, and quality of the light you use is one of the surest ways to improve your photos. We'll show you how to use lighting to your advantage-and give you some helpful rules for when and when not to use your camera's flash.

encyclopedia, timeline, and map elements

The Interactive Periodic Table is a game designed to help chemistry students practice identification of the elements.

"Simplicity Can Seem Complex Memorable pictures are made using time-tested techniques, methods -- and, yes, even tricks. To help photographers of all stripes up their game, LIFE.com is launching a series of "lessons" on photography, focusing on elemental aspects of picture-taking. One of those aspects, of course, is the critical consideration of lighting. LIFE.com asked professional photographer Tyler Stalman to offer insights on effective lighting, use of shadows, shooting at night, etc. Of this stunning Andreas Feininger picture of a young Dennis Stock (a formidable photographer in his own right) holding camera in front of his face, Stalman says, "The main lesson here is that a smart, accomplished photographer can manipulate light and shadow so the viewer is not immediately aware of what's going on -- while knowing that the image itself is somehow powerful. I admit, I went for years without realizing that it was simply lighting at work in this picture, creating an amazing 'shape' within the image, rather than the subject wearing gloves, or a sort of cowl on his head. So sometimes a really simple technique -- like this tight circle of bright light on a face -- really goes a long way.""

"Find Natural Frames Memorable pictures are made using time-tested techniques, methods -- and, yes, even tricks. To help photographers of all stripes up their game, LIFE.com is launching a series of "lessons" on photography, focusing on elemental aspects of picture-taking. One of those aspects, for instance, is composition, or how a picture is framed, and how that frame is filled. LIFE.com asked professional photographer Tyler Stalman to offer insights on effective composition. "I love this photograph," Stalman says of Ralph Morse's shot taken on a naval ship in 1942 for LIFE. "Keep an eye out for natural frames for your subjects. Here, even if the doorway or hatch had not been there, it would have been a nice photo. But the framing adds an extra level of drama: You get a kind of voyeuristic look through the door, which is heightened because the guy is not looking at the camera, as if he's unaware of it.""

"Look for New Environments, Mix People Up Memorable pictures are made using time-tested techniques, methods -- and, yes, even tricks. To help photographers of all stripes up their game, LIFE.com is launching a series of "lessons" on photography, focusing on elemental aspects of picture-taking. Among those: portraiture, or how to take pictures of people that really feel alive. LIFE.com asked professional photographer Tyler Stalman to offer insights on taking great portraits. Of this classic LIFE photograph by John Loengard of the Beatles in a pool in Miami, Stalman says: "Most people, when taking group shots, want to line everybody up -- even putting them in rows -- but when you have a bunch of people it's great to put them in a new or unexpected environment. Like this Loengard photo: you get all this extra depth in the picture, and there's so much going on at once. Don't be afraid to shuffle people around when you're doing a group shot.""

software download "OE-CAKE acts as a physics-based paint program. Users can insert objects and see them interact under the laws of physics. It has an advanced fluid simulator with support for things such as gases, rigid objects, and even elastic materials. With the escape-codes, users can also mix the properties of elements together. You can even add your own pictures to the simulation!"

Webguide - "The exploration and settling of the American West began well before the Civil War. Although it was slowed down by the War, it resumed again in earnest after the conflict ended. Learn about essential elements in the settlement of the West, like the transcontinental railroad, the fur trade, immigrants and the Gold Rush, for example."