How much money is enough money? Future wage earners explore the minimum hourly wage and then use it to calculate monthly and yearly earnings. They use an interactive to consider living costs and determine whether earning a minimum wage...

This lesson defines the term ratio. Students can look at a two-page presentation of notes and practice problems.

This lesson demonstrates how to simplify ratios. It is 3 of 5 in the series titled "Simplifying Ratios."

This lesson demonstrates how to simplify ratios. It is 1 of 5 in the series titled "Simplifying Ratios."

This lesson demonstrates how to write ratios using both number and variable notation.

This site gives a diagram of a golden rectangle, the value for the golden ratio, and a few problems for students to work relating to the golden ratio. This site does not however explain the significance of this ratio.

This lesson will introduce the means and extremes of a proportion, and demonstrate how to use cross multiplication to determine if two ratios are equivalent. It is 5 of 8 in the series titled "Equivalent Ratios."

This lesson defines the term ratio.

This lesson demonstrates how to simplify ratios containing measurements. It is 4 of 4 in the series titled "Simplifying Measurement Ratios."

This image shows the golden ratio spiral with colors used to show the different sections.

This lesson explains how to compare measurements using ratios. It is 3 of 5 in the series titled "Measurement Comparisons."

Over 3,900 mineral species descriptions are included in this HTML-linked table of Dana classifications for all known valid mineral species. 3-D models are available for over 600 minerals.

A useful tool that facilitates comparison of any two countries to find out the land size ratio between them.

This lesson will introduce the meaning of weighted average, and demonstrate how to solve for the weighted average of a data set. Students can look at a presentation and then take an online quiz.

This lesson presents the relationship between similar polygons and the ratio of their perimeters. It is 5 of 5 in the series titled "Similar Polygons and their Perimeters."

This lesson will introduce the meaning of weighted average, and demonstrate how to solve for the weighted average of a data set. Students can look at a presentation and then take an online quiz.

In the general election of 1896, the principal question at issue was the financial policy of the country. William J. Bryan, of Nebraska, was the candidate of those who 'demanded the free and unlimited coinage of both silver and gold at...