Activity 1: Observations of an Extrasolar Planet: Transit Method
Activity 2: Observations of an Extrasolar Planet: Astrometry Method
Activity 3:  Observations of an Extrasolar Planet: Spectral Method

Science on the Internet

Extrasolar Planet Exploration
NASA PlanetQuest
Extrasolar Visions
Extrasolar Planets Encylopedia

Search Methods
Transit Method
The Planetary Society - Photometry: A Method for Finding Earths
The Planetary Society - Astrometry: The Past and Future of Planet Hunting
The Planetary Society - Spectroscopy and its Discontents
Capabilities of Various Planet Detection Methods (Includes more than transit, astrometry, and spectral)

Newton and His Laws
The Newton Project
The Physics Classroom - Newton's Laws
Hyperphysics - Newton's Laws