Introduction to the basics of ray tracing.

Now you can start scaling your shapes to make your lamp look younger.

Use an array to store many objects as well as create any shape you can imagine. Click here to review objects.

Let's take a closer look at the weights used during subdivision. Do we have to be careful when selecting weights?

Next let's extend the averaging step from the previous lesson to include multiple points. Now we'll need to calculate positions using a weighted average.

Now you are ready to start subdividing your own shapes with more than 4 points!

In this AP Chemistry exam free response, students are ask to find the order of reaction based on graphs of absorbance, ln(absorbance) and 1/(absorbance) vs. time for kinetics of bleaching food coloring. This video explains how to solve...

Do you need to review Gibbs free energy and equilibrium constant of dehydration reaction for the AP Chemistry exam? This video works a free response question from the AP Chemistry exam. [12:22]

Virupa is shown as an unorthodox figure with bulging eyes, a bushy beard, a large nose, and an expressive face. He wears flowers in his hair and a meditation band around his knee to keep his limbs in place during prolonged meditation....

In this video [7:06] view important Buddhist sites and rituals in Tibet. Note: This video does not include narration.

In this video [3:52] discover the sacred arts of Tibet. Tibetans don't really have a word for art; the term is Gunda, something which is like the body of the Buddha. A painting or a statue is not considered complete and unless it's been...

What actually happened in the novel Uncle Tom's Cabin that so affected nineteenth century audiences? Kim and Becca discuss the plot and social implications of Uncle Tom's Cabin. [6:19]

How could a novel start a war? Kim and Becca discuss the growing sectional conflict in the 1850s that surrounded the publication of Harriet Beecher Stowe's novel Uncle Tom's Cabin. [7:31]

Learn to use a virtual protractor to measure angles.

This is a short documentary [3:20] about one of India's most sacred cities, Varanasi. One of the holiest sites in India is Varanasi located along the banks of the river Ganges. Each year millions of pilgrims come to visit the sacred city...

This video shows how penicillin in bread mold kills bacteria. [3:02]

In this video, you'll find the materials and tools you'll need to build your own Vocal Visualizer, as well as all the necessary steps. [7:09]

Here's everything you'll need to build your own colored shadows. [2:12]

Learn how to make a simple"but effective"spectroscope out of an old CD and a cardboard tube in this video. [3:43]

In this video, you'll find the materials and tools you'll need to build your own penny battery, as well as all the necessary steps. [5:50]

This is an update on the Curiosity Rover in which the first candidate drill site found on Mars. [1:47]

Learn how hormones help to coordinate a baby's need for milk (sucking or crying) with a woman's release of milk. [6:52]

Learn the basic anatomy of the breast and how it's designed to nourish a baby with milk. [4:10]

Learn the mechanics of breathing, and how breathing air in is quite different from breathing air out. [12:04]