Here is a 1-5 day unit on electromagnetic radiation that features a teacher guide and student activities with extensions.
This site from the UCMP Berkeley provides information about the Cretaceous Period, the last portion of the age of the dinosaurs and the continued break up of the continent of Pangaea.
Learn about the four types of deserts: hot and dry, semiarid, coastal, and cold with this key facts and information. Includes links to other biomes: aquatic, forest, grasslands, and tundra.
The Dinosauria provides the latest information about dinosaurs, including debunking myths, early dinosaur discoveries, characteristics of specific dinosaurs, life history, and discovery of dinosaur fossils.
This site provides a brief overview of the Precambrian Era and provides a clickable chart that breaks down this era into five different time frames. A lot of info is provided on each of the five.
This is a lesson designed by a biology teacher. In it, students use maps and evidence of island age, molecular genetics, morphology, and distance apart to determine how the islands came to be occupied by different species of lizards. It will take some time and requires extensive background knowledge.
This is a very good introduction to the role evolution plays in the development of biodiversity. These topics and extinction are explained with the use of colorful interactive pictures.
Visit the virtual exhibits at this site to learn more about paleontology, the history of the earth, and life on earth. Use the information on this site to understand geology, geologic time, evolution, and phylogeny.