Tag Archives: teaching

Free Film Teaching Servies

Step 1: Earlier than the get together, pick up a small bag of potting soil, small clay pots (21/4- or 3-inch pots work nicely), and cheap packets of fast-growing cat grass. The grass will sprout within a week or two,

Free Air Teaching Servies

1. Generating Power: Usually, high pressure water pumps are used in thermal power plants. How high should I drop this ball? Suppose I want to drop a ping pong ball in a lecture class to show that you need to