Paleontologists have been remarkably successful in determining what earlier life forms looked like, as well as how they probably behaved when alive. This interactive feature illustrates a slab of rock containing fossils of several types of creatures that once inhabited the Borden Sea, over 300 million years ago in what is now central Indiana. Clicking on highlighted fossils accesses animations of ... Full description.

This is the information and sales site for the National Science Teachers Association (NSTA) "SciGuides", which are structured lesson plans that use existing websites. Each guide begins with a description of its contents, narrowing down into specific themes. Themes are described and broken down into keywords which point to supporting Internet resources. K-4 guides include Life Cycles and Inherited ... Full description.

In this lesson students will investigate the effect of water depth on deep-water crab reproductive biology in the Gulf of Alaska. They will analyze data from a simulated sampling program, interpret results of their sampling program, and apply their results to draw conclusions about appropriate fishery regulations to protect reproductive opportunity among deep-water crab populations. Full description.

PALS is an on-line, standards-based, continually updated resource bank of science performance assessment tasks indexed via the National Science Education Standards (NSES) and various other standards frameworks. The tasks, collected from numerous sources, include student directions and response forms, administration procedures, scoring rubrics, examples of student work, and technical quality data calculated ... Full description.

This is a series of interactive modules that explore the history of life on Earth, while focusing on the processes of science. Each module contains suggested lesson plans and an extensive teacher's guide. In addition, each module has a suggested grade level and an adaptable grade level. Full description.