An interactive lesson from aaamath.com. The student can learn, practice, play a game, and explore counting to 100.

This timeline provides links to the texts of the Alien and Sedition Acts, and the Kentucky and Virginia Resolutions that protested them.

Dr. Johnson defines the term "specialization" and reasons for its development in our economy.

Site provides extensive assistance in preparing 4th grade students for Florida Comprehensive Assessment Test. This section focuses on identifying the author's purpose.

Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.

By the end of this section, you will be able to do the following:

Explain in what way smell and taste stimuli differ from other sensory stimuli
Identify the five primary tastes that can be distinguished by humans
Explain in anatomical terms why a dog’s sense of smell is more acute than a human’s

This resource from the CIA World Factbook provides a detailed fact sheet of El Salvador. The content covers the country's geography, people, government, economy, communications, transportation, military, and transnational issues. It includes images of maps and the flag, as well as photos of the country.

In this lesson plan students will be able to focus on the main events of a book by drawing a storyboard. Lesson plan indicated for 2nd grade and above.

Learning about transcription and translation can be difficult but this animation helps make the processes less confusing. The animation is interactive and it also covers the overall importance of proteins.

A thorough account of the methodical removal of the Chickasaw Indians from "their historic homeland." Site also provides a link to further information on the Chickasaw Nation.

Challenge yourself to a game for testing your measurement skills using a ruler. You may choose to have yourself timed.

This video segment adapted from NOVA features the twisted and melted forms of the Grand Canyon's oldest rocks, the 1.7-billion-year-old Vishnu Schist.

This site is the home page for Habitat for Humanity International. You can follow links for more information on this wonderful social program. Link topics include: "Get Involved," "Where We Build," "How it Works," and "True Stories." Find the nearest project to you by typing in your address.

Plants grow and change on a time scale that is too slow for us to observe in real time. Time-lapse photography is a simple technique that allows us to see the movements of plants and clearly demonstrates that plants are living and capable of some extraordinary things. This site is full of Quick-time movies that show various aspects of plant growth with textual explanations accompanying each movie and topic. Movie topics include Germination, Photomorphogenesis, Tropisms, Circadian Responses, General Growth, and more. Within each topic are more choices.

An explanation of the Mohs Hardness scale is followed by illustrations of crystal structures and cleavage.

Outstanding information (and a lot of it) on gas turbine (jet) engines. Describes the history behind their development and the theory behind their operation. Well written and includes very informative graphics.

This site provides great discussion of the causes and effects of the German Hyperinflation of 1923.