Learn how to make hot ice VERY COOL

This short video teaches you how to make real ice cream in a bag.

Why is salt needed to make ice cream?

As molecules in a solid get hotter, they vibrate faster and faster and eventually slip out of their lattice-work pattern. When this occurs, the substance melts, changing from a solid to a liquid state

An explosion in green building is underway, with cleverly engineered libraries, office buildings, even public housing projects popping up across the Bay Area, and championed as much by landlords trying to cut energy and water costs as by environmental groups.

Essential Practices in Classroom Management.

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