This page from "Punctuation Made Simple," features comma use. Brush up on your comma skills with plenty of examples.

What is an apostrophe and how is it used properly in punctuation? "Punctuation Made Simple," gives some concrete examples for apostrophe use.

How is a dash used in a sentence? "Punctuation Made Simple," answers this question and gives examples to make the concepts easier to grasp.

What purpose does a colon serve in a sentence? Use this website for explanations and examples of colon use.

In this lesson, students learn about work as defined by physical science and see that work is made easier through the use of simple machines. Already encountering simple machines everyday, students will be alerted to their widespread...

This very simple, but effective generator shows in a wonderfully engaging way the fundamentals of electricity generation. The generator is made from a coil of wire wound around the outside of a plastic 35mm-film can. The two coil ends...

Exploratorium Science Snacks are miniature science exhibits and experiments that can be made with common, inexpensive, easily available materials. These electricity snacks represent a set of devices that you can build and experiment with...

In this video segment adapted from ZOOM, the cast tries to design and build a bridge made out of drinking straws that will support the weight of 200 pennies. [4:02]

This site, maintained by Dr. Chris Rorres of Drexel University, demonstrates how the design of Archimedes screw has made lasting impressions upon modern society. These historic engravings demonstrate the practical uses of the screw in...

Students continue their pyramid building journey, acting as engineers to determine the appropriate wedge tool to best extract rock from a quarry and cut into pyramid blocks. Using sample materials (wax, soap, clay, foam) representing...

This website provides a very simple walk-through of how a bill becomes a law, with minimal explanation.

This tutorial offers an animation depicting the induction charging of an electrophorus plate by the process of induction. Animation depicts the movement of electrons between plat and ground. The animation is accompanied by explanations...

Have you ever heard that the moon is made of cheese? Even though the craters on the surface of the moon resemble holes in Swiss cheese, we know that this common myth is not true. Find out how craters are formed and why they are different...

Though rock candy seems to be a simple enough treat, it is also pretty interesting to make. Crystallized sugar that can be grown from a sugar-water solution is just how rock candy is made. In this experiment, you will learn to make your...

Some perfumers can distinguish individual odors in a fragrance made of hundreds of scents; tea-experts have been known to sniff out the exact location of a particular tea; and the NYC Transit Authority once had a employee responsible...