Okay, so you’re a new (or not-so-new) elementary teacher, and you need to teach science. Some teachers feel apprehensive when they think they have to teach science, but let me assure you, it’s the easiest subject to teach in elementary school. Why? Because the kids are totally into it! Children are born with that natural curiosity. As infants, everything goes into their mouths to taste, feel and discover their surroundings. It’s only when we kill this curiosity that kids begin to dislike or even fear science class. Here are 20 easy tips for all elementary teachers that will foster your students’ love of science.
How the SpillNot works:
When you hold a cup of juice while walking, the juice tends to spill because the cup accelerates forward (ax, FIG.1, green arrow) and backward (-ax) with each step. The juice tips in response to that acceleration, and may spill over the rim of the cup. The Spill Not automatically tips the cup so that its top stays parallel to the juice surface (FIG.2). For example, if the juice surface tips to 30 deg, but the cup stays horizontal, the juice could spill. But if the cup also tips to 30 deg, we get no spill! Note that there are only 2 forces on each portion m of juice…the weight mg down, and the buoyancy force Fb of the juice pushing at a right angle to the surface. These two forces result in a horizontal accelerating force ma (in red). We see from FIG.1 that