Events of Rene Descartes' life are presented in a timeline form. The biographical information is taken from "A Short Account of the History of Mathematics" by W. W. Rouse Ball (4th Edition, 1908).

The Study Skills Help Page offers many learning strategies for success. The website is based on a college course - it has a wide variety of online learning resources such as study skills course objective, notes, and practice tests/games.

By using digitally manipulated images, test your brain to see how much information is needed for your brain to produce an image.

Here is an activity where students experiment with how the brain receives a strange view of a familiar object.

Understand that what you see is often affected by your expectations of what you think you should see. This activity will explore the sensation you feel when your brain expects to see something.

Did you know that different-colored backgrounds cause colored objects to look different? In this investigation, students will experience this phenomenon.

Observe adaptation and perception in the activity. This activity will have students watching a continuously rotation spiral to see what happens as you watch it and then look away.

An activity to test your perception to see if you can distinguish between different shades of gray.

A page at the Isaac Newton (1642-1727 CE) Institute for the Mathematical Sciences website. This page, the contents of which come from the Microsoft Encarta encyclopedia, describes the upbringing, the education, the scientific and...

[Free Registration/Login Required] An informational text about how 3-D televisions work. A question sheet is available to help students build skills in reading comprehension.

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

An app for investigating the operation of a refracting telescope. The location of the eyepiece and objective lens can be altered, and the focal point and path of light through the lenses can be observed.

Definitions of many technical and anatomical terms related to vision and the eye.

Wikipedia provides a simple definition of the term, "Video," including many hyperlinked words and an external link.

A series of pages explaining how microscopes work, the parts of a microscopes, the techniques of using a microscope, and other useful information.

Notes explaining the basic concepts of stereochemistry.

A description of the wings and compound eyes of insects and its components; also discusses the advantages and disadvantages of having compound eyes.

Find out how your eyes work and try an experiment involving a cartoon flip book.

A PowerPoint presentation that explains chirality and chiral molecules.

Using a question and answer format, this page discusses the technical aspect of pinhole glasses. Defines, illustrates and discusses pinhole glasses.

Hunkin's Experiments is a group of simple cartoon illustrations of scientific principles. Some would work well in the classroom, but others have little value beyond entertaining students. All of the projects are easy to do and use...

Defines the refraction of light and provides an applet for investigating it.

A fairly short biographical sketch of Willebrord Snell (1591-1626 CE). Discusses his upbringing, education and professional life.

This site provides an image of M.C. Escher's lithograph, "Convex and Concave," which can be enlarged by clicking on it. Included is a brief quote, "from the text of M.C. Escher - the Graphic Work," which provides some insight into...