Today's gourmands don't consider spices to be the equivalent of silver and gold. During the middle ages, however, these commodities were precious. People back then used spices in religious ceremonies, to cure rotten food, and as a show...

Provide a Hooke for a lesson on elasticity with an activity that has groups investigate a set of springs. They use a set procedure to collect data to calculate the spring constant for each spring using Hooke's Law. The groups...

The last segment of the nine-part unit makes a connection between springs and linear equations. Groups hang weights from the spring and measure its length. Then, using the data collected, they calculate the slope to find the k-value...

Never trust an atom; they make up everything! Young chemists make modeling dough and add another ingredient to change the properties. Scholars then compare the properties of emulsion to composite materials. A reading passage and analysis...

Wheeeee! Young thrill seekers build a bungee jump—not for themselves, though, but for an egg. The egg must fall from a height of five feet and rebound within two inches of the ground or floor.

Wind it up and let it go. Individuals build a basic spool racer in the second portion of a six-part unit on energy. After receiving three criteria, pupils modify their designs to meet the new challenge. Pairs compete against each other...

This site discusses price elasticity, along with the formula for "arc elasticity," which is a different method to calculate price elasticity.

This site explains price elasticity of supply. Includes graphs to represent the concept.

This site offers a good description of price elasticity of demand for a good, and gives examples of which kinds of goods may be elastic or inelastic.

This site provides a great definition of "price elasticity of demand," along with formulas and examples. It also shows a perfectly elastic demand curve and a perfectly inelastic demand curve.

This site gives easy to understand definitions of price elasticity, along with examples, formulas, and factors determining elasticity.

This site provides a thorough analysis of the concept of elasticity, and uses an example in the health care industry.

An easy to understand description of "price elasticity of demand." Includes definitions, graphs, formulas, and examples of what kinds of goods may be elastic or inelastic.

Many examples of price discrimination are provided, along with supporting graphs, and reasons why firms engage in this practice.