How does weather affect Earth? Learners understand the characteristics of water and make predictions about weather patterns. They recognize how water and weather affect rocks and minerals through erosion. They also learn about fossils...

Explore a variety of science concepts in an interactive textbook created for middle school scholars. A lengthy table of contents takes readers to pages comprised of a subject overview, outline, and summary. Follow links further to find...

Are spiders related to crabs? Study the order of arthropods with a reading selection about animal diversity. It provides details about each class within the order, as well as vivid pictures and explanatory charts. 

This heady calculus text covers the subjects of differential and integral calculus with rigorous detail, culminating in a chapter of physics and engineering applications. A particular emphasis on classic proof meshes with modern graphs,...

A description of the lack of original Roman science, focusing on the influence of Greek ideas and concepts on the Romans. Click on 'Next' at the end of the text to continue for four more pages on this topic. These talk about Strabo the...

Use the scientific reasoning and critical thinking to take an in-depth look at the basics of biology.

Understand the history of the Earth through geologic time.

This resource provides online text, including an introduction by the author, for "The Adventures of Captain Bonneville," by Washington Irving. Contains a link to the publication history for this work.

Explore the behaviors, characteristics, and diversity of arthropods.

Explore the behaviors, characteristics, and classification of cnidarians.

Learn about the first form of life on Earth, the cell.