Kick-start a discussion of the importance of biodiversity with a colorful resource that touts the benefits of maintaining healthy ecosystems. The images stress the interdependence of all the elements of an ecosystem.

A site dedicated to providing vocabulary for the elements of visual design. Includes a visual notation system for describing both the elements and attributes of art.

The dynamics of shape in art and the relationship of shape with the other elements of art. The effects of angles and lines on perception.