Make a Cartesian diver using a plastic bottle and either an eye dropper or a ballpoint pen. Don't know what a Cartesian diver is? Find out here.
I Know That Here's an amazing site that will catch students' attention immediately. It offers 11 extremely interactive and engaging activities in which students are able to do everything from shaking down a building with a catastrophic earthquake to seeing what they might look like from outer space.
from Educators' eZine As a retiree, I have lots of time to seek out some great free or low cost technical software that educators may use as teaching aids. I have done this three times before (see past articles) but recently I have begun digging even deeper to find some really esoteric but still useful stuff. In