Other
Find Biometrics, Global Identity Management
This site is geared more toward a consumer than a student, but it does list, describe, and in some cases compare each of the primary identification methods (fingerprints, iris recognition, voice, etc).
Other
Ibm: Biometrics
This site from IBM provides a simple introduction to the field of biometrics and includes descriptions with examples for several personal identification and recognition systems (e.g., fingerprints, hand geometry).