Online children's story that teaches about genes and how they direct how you react to things in your environment. Click on "next" at the bottom of the story to see how different people respond differently to harmful substances.

Practice using your graphing calculator for solving proportion problems. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly under each problem.

Twenty-five problems present a variety of practice identifying and graphing various functions. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View...

In this activity, students recognize direct variation as a rate of change and apply it in problem situations. They also use average rates of change to make decisions in problem situations.

An overview of basic high school algebra topics can be found here. Absolute value, signed numbers, inequalities and equations, mixture problems, and direct and indirect variation are all listed, each with links to questions posed by...

Explains what stabilizing selection is and how this type of natural selection actually limits genetic diversity in a population. Presents examples of stabilizing selection in different plants and animals.

This site from the University of Illinois offers an excellent simulation of the quadratic formula, where you can type in different values for a, b, and c, and then view the change in the answer for x.

Work samples, phenomena, assessment templates, and videos that directly address standard MS-LS4-4: natural selection.

Take a closer look into the modern view of evolution. This article includes many pieces of evidence, all which support the theory of evolution.

Syriac is a branch of the Aramaic family of languages and was the lingua franca of the eastern Roman Empire at the beginning of the Christian era. It is also spoken extensively in the regions farther east. It became the language of...

"Mande" is a term that has been used to identify the culture that embraces the western third of Africa's great northern savanna and coastal forests. The Mali Empire was the source of the Mande diaspora; therefore, in a broad sense,...

Written directions to a variation of the Charleston using the front to back dance style. Lists some suggested swing music cd's.

This creative applet allows you to tessellate variations you create starting with either a triangle, rectangle or hexagon. Directions are only a click away.

In this lesson plan students will manipulate a hands-on, physical model to better comprehend the natural variations of tree-ring width and their uses for determining past climatic conditions. Students use the model as a real-world data...

Young children practice jumpting and hopping through "Spot jumping," a game that requires them to listen to an instructor's directions and perform specific hopping tasks. This website includes ideas for homework related to the activity,...

"South China comprises the drainage basins of the middle and lower Yangtze River, the basin of the His Chiang (West River) in Kwangtung and Kwangsi; and the mountainous coastal provinces of Fukien and Chekiang. The division between the...

A map from 1920 of Africa and Madagascar showing the mean annual rainfall distribution given in inches, seasonal variations in precipitation, and seasonal costal wind direction. The map is color-coded to show annual precipitation ranging...

A map from 1898 of Mexico, Central America and the West Indies. The map includes an inset map of Cuba and the Isthmus of Nicaragua. "The surface of the Rocky Mountain highland in Mexico is quite similar to that of the great plateau...

A map of England, Wales, and southern Scotland during the Saxon Period from around AD 450 to the beginning of the Norman Conquest in 1066. This map shows major cities of the time, major river ways, topography, and is color-coded to show...

[Free Registration/Login may be required to access all resource tools.] Learn how to solve problems using scale and indirect measurement.