Understand what natural resources are, and how important they are to Earth.

Review the process of species changing and evolving over time.

Use this illustrated overview of invertebrates for review.

This digital textbook covers core biology concepts and includes interactive features, real-world examples, videos, and study guides.

This unit will help students prepare for your final exam for this course as well as the AP Biology exam in May.

This site provides photographs, animations, essays, teaching resources, multimedia, and other information about biological systems and organisms. It features a monthly contest and quiz in which students and teachers identify a mystery...

This scoring guide can be used as a study guide, provding examples and exemplary student responses. The topic covered is energy flow in ecosystems.

Plants are essential for all life and development. Teach your students about this incredible lifeforce with this teaching guide, lecture notes, and PowerPoint presentation. [PDF]

Looks at the impact of overharvesting, such as overfishing, on biodiversity. It talks of the 'tragedy of the commons,' where harvesters do not feel responsible for protecting a species because they fish in shared areas. It also touches...

Explore the concept of scientific reasoning, and compare and contrast hypothesis and theories while understanding the difference between deductive and inductive thinking.

Explains the processes by which energy flows through an ecosystem. Covers the meanings of key vocabulary, e.g., types of producers and consumers, trophic levels, food webs, and the energy pyramid.