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00:04:55
How do you give your students the words they need to understand an activity or a topic? TI Staff Educator Modesto Tamez explains his opinion that vocabulary is best given towards the end of a lesson, not at the beginning.

00:00:38
This electrifying After Dark event featured Austin Richards, Ph.D.���aka, Dr. MegaVolt�����jousting with 14-foot electrical arcs from his high-voltage Tesla coil on the evening of Thursday, November 5, 2009. This wonderful performance contributed to the celebration of the Exploratorium���s 40th Anniversary.

00:33:08
Is water ice present or absent in a crater near the moon's south pole? NASA���s Lunar CRater Observing and Sensing Satellite (LCROSS) mission is seeking a definitive answer. Join Exploratorium staff for a special Webcast featuring live coverage of LCROSS crashing into the moon! Our team will be broadcasting live from the 36" Refractor Telescope at Lick Observatory on Mt. Hamilton, where we���ll watch the impact and investigate how this intentional crash could reveal the existence of water ice.

00:05:23
Our host, Stephanie Chasteen, shares some more fun facts and activities having to do with the science of sound.

00:06:45
Kids can be pretty skeptical, which can help them to learn more. Children���s book author David Schwartz shares some of the letters from classes who thought they should double-check the numbers in some of his books.

00:00:25
Our 40th anniversary members' magazine has a cool augmented-reality cover that works with your webcam. Try it here.

00:07:59
Staff educator Tory Brady tells you how to make a teaching box���a valuable tool for getting yourself organized to teach a great science unit.

00:04:08
TI staff educator Eric Muller shows me how to carbonate my tongue. Blech!

00:04:51
A detailed demonstration of how to do the Color Chromatography activity, which lets you see the colors hidden in black ink. Includes a discussion of materials needed.

00:00:51
An introduction to how to make your own simple speaker, which transmits sound from a radio or MP3 player and demonstrates the principles of electromagnetism and vibration.