In this media-rich essay from the NOVA: "Mystery of the First Americans" Web site, learn about the atomic structure of radioactive carbon and how it can be used to determine the age of organic remains, such as bones and teeth.

You will learn strategies for evaluating and revising an essay so that similar grammatical structures in sentences, phrases, and paragraphs are parallel.

[Accessible by TX Educators. Free Registration/Login Required] Learn strategies for evaluating and revising an essay so that similar grammatical structures in sentences, phrases, and paragraphs are parallel.

Practice strategies for evaluating and revising parallel structure in an essay.

Learn strategies for evaluating and revising an essay so that similar grammatical structures in sentences, phrases, and paragraphs are parallel.

In this lesson, you will learn strategies for evaluating and revising an essay so that similar grammatical structures in sentences, phrases, and paragraphs are parallel.

From textiles to ceramics, metalwork, and architecture, Andean cultures produced art and architecture that responded to their natural environment and reflected their beliefs and social structures. Read more about the Andean culture in...