What features do scientists use to classify animals into groups? Class groups examine a series of paired images of vertebrates (a bass and a trout, a toad and a newt, a crocodile and a tortoise, an owl and a robin, a tiger and a bear)...

Don't be fooled by the title; this is not really a lesson on elements. It is a project on classification, using the periodic table as an example. For that reason, it could be used in any branch of science. As an example, a group may...

Art and science come together in a lesson based on Flower Still Life by Ambrosius Bosschaert the Elder. Learners classify plants and insects in the painting by color, leaf shape, size, reproduction, and season of bloom.

Young scientists access the EARTH Web site in order to engage in this lesson life forms found in the ocean. Student groups of 3 - 4 choose one set of deep-sea organism images. The groups decide how they would classify their organisms and...