Triangles are all about threes, and practicing proving postulates is a great way to get started. The first page of the worksheet provides a brief introduction of the different properties and postulates. The remaining pages contain...

How does something go from here to there? Describe it with a transformation. Young mathematicians learn how to translate, reflect, rotate, and dilate an image. 

Investigate how similar and congruent figures compare. Learners understand congruent figures have congruent sides and angles, but similar figures only have congruent angles — their sides are proportional. After learning the...

After reviewing characteristics of seven types of triangles, young geometers discover how to find the missing angle of a triangle. Then, they practice identifying triangles, find missing angles, and find missing side lengths of...

Teach your language learners all about the Spanish alphabet with a lesson, presentation, and graphic representation. The lesson portion is mostly information, and doesn't include an instructional sequence. Class members can visit the...

What do you create when you rotate a ray? An angle! Teach all the angle basics including naming, measuring, supplements, and complements. 

One of four sets of 26 ABC cards that have definitions and descriptions of geologic terms and earth science concepts. This set looks at significant geological locations in Indiana.

One of four sets of 26 ABC cards that have definitions and descriptions of geologic terms and earth science concepts.

One of four sets of 26 ABC cards that have definitions and descriptions of geologic terms and earth science concepts.

One of four sets of 26 ABC cards that have definitions and descriptions of geologic terms and earth science concepts.

A brief overview from the ABC Country Book of the economy of Suriname. Includes statistics on all economic indicators, including GNP, employment, imports, and exports.

This site has a detailed summary of the economy of Brazil. An overview is given followed by statistics on each sector.

Informative site detailing the use of computer floppy dirves. Content includes a focus on floppy drive ABCs, floppy history, floppy cable, creating a floppy boot disk, floppy disk definitions, and coverage of 3.5 and 5 1/4 floppy diskettes.

Informative site detailing the use of computer hard disk drives. Content includes a focus on hard disk drive ABCs, hard drive specifications, hard drive interfaces, size information, debug routines, hard drive troubleshooting, hard disk...

A complete guide to the computer BIOS, including BIOS ABCs, BIOS Simulations, troubleshooting,and motherboard definitions.

A complete guide to computer monitors including monitor ABCs, dot pitch, ghost/burn effect, resolution, monitor controls, refresh, LCD and video definitions.

A short site dealing with the people of El Salvador. Gives population, growth rate, age structure, birth and death rates, ethnic divisions, religion, life expectancy, literacy rate, etc. Information from 1995.

This site has facts and statistics about Brazil's government. It includes information on all branches of the government.

Describes the brain and brain tumors.

The Coelophysis lived in the Late Triassic period over 215 million years ago. A large cache of Coelophysis bones were found in New Mexico in 1947 - the dinosaurs had apparently died of thirst. This fact file has more information and a...

Did you know that turtles migrate 1400 miles to lay their eggs? Did you know that penguins swim underwater at 55 MPH? Click on this site to learn more interesting facts.

From ABC News in Science, this article examines the gender role within the shark kingdom. The research is connected to the Great White Shark and it suggests that only the male shark roams, while the females stays close to home.

From ABC News in Science, Anna Salleh's article explores the research of Dr Geoffrey Isbister and his work with facts and myths surrounding spider bites.

From ABC News in Science, Marlowe Hood's article on animals with attitude covers topics related to the evolutionary process whereby certain animals within the same species can react differently in given situations based on differing...