[Free Registration/Login may be required to access all resource tools.] An introduction to Charles Darwin and his theory of evolution by natural selection is offered for students. Meet the writers who influenced Darwin to develop his...

An article comparing creativity theories of psychoanalytic, behavioristic, and humanistic psychology.

Online collection of articles and excerpts about critical theory from contemporary writers.

[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will explain the law of conservation of mass, the law of definite proportions, and the law of multiple proportions. They will also...

An article defining the development of psychology's Attachment Theory, originally identified with that term, by John Bowlby. Identify other contributors to the scientific theory and whether only children experience it.

Discusses the discovery of Homo neanderthalensis and describes the different theories that have been put forward to explain why Neanderthals became extinct.

This site discusses the two theories that Ricardo created. The Distribution theory and the International Trade theory (Comparative) are explained in detail.

Read about three theories of Imperialism and how actions by the United States in the late 19th and early 20th centuries were driven by one or perhaps all three of the theories.

An indexing page for an elaborate and in-depth hyper-textbook on various physics topics. This page indexes several others which pertain to human ability to perceive sound and recognize pitch. Introduces and explains Place Theory.

Discover Alfred Wegner's ideas relating to continental drift and seafloor spreading which are both evidence to the concept of plate tectonics.

A detailed explanation of the Phlogiston Theory, including reaction equations. Includes several formulas, examples, and detailed information.

Fear of Physics uses animations and simple language to teach the theory of relativity.

[Free Registration/Login may be required to access all resource tools.] Discusses what a tectonic plate is and how scientists can recognize its edges, how the plates move by convection in the mantle, the three types of plate boundaries...

An overview of monopoly, oligopoly and duopoly, focusing on the interdependence of firms in an oligopoly, shown through the use of a game tree how these firms are tempted towards the practice of collusion.

This site from the Northern Illinois University gives general background information on probability and also includes books and other websites that contain information on Probability.

This site explores current theories about how the Solar System was created.

Describes how the process of science works the same whether at the microscopic level or over a long period time. Clearly explains what a theory and a hypothesis are, and what an over-arching theory is.

Defines inertial and gravitational mass, their scientific history, formulas used in their calculation, the definition of weight, units used for mass, and mass as perceived in the theory of special relativity.

Virtual learning course in which students investigate theories of human development through multi-media and interactive learning activities. Comprehensive set of learning materials included.

Virtual learning unit on the theories of personality and the study of stress. Students will find a variety of engaging activities including a personality test, introvert/extrovert experiment, presentation, and video series in addition to...

[Free Registration/Login may be required to access all resource tools.] Find out how coevolution can occur in nature and identify the endosymbiotic theory.

This resource features information on notes, rests and many, many other basic music theory examples.

Based off of the hit television show NUMB3RS, this lesson introduces students to one of the prominent algorithms in graph theory used to find shortest paths -- the Djikstra Algorithm. The lesson includes four graphs of increasing...

This module focuses on cell structure and how the organelles function together to form the smallest unit of life. The cell theory is also discussed along with the basics features of the cell. Site also includes an interactive practice...