University of Minnesota
University of Minnesota: How Does Light Travel?
Contains a four step procedure to deriving the law of reflection using algebra, Fermat's principle, and calculus (simple derivatives). This is good for an in-class theoretical exercise.
Science Education Resource Center at Carleton College
Serc: Mn Step: Reflection Race: Exploring Reflection of Light
An interesting and engaging activity where students work in groups with a laser pointer and small mirrors. They must use their knowledge of angles of reflection to bounce the laser beam from mirror to mirror until it hits a target at the...
Walter Fendt
Walter Fendt: Reflection and Refraction of Light
Defines the refraction of light and provides an applet for investigating it.
University of St. Andrews (UK)
University of St. Andrews: Willebrord Snell
A fairly short biographical sketch of Willebrord Snell (1591-1626 CE). Discusses his upbringing, education and professional life.