ArcGIS 10 training, lots of podcasts and on-line classes to come. Most of the training is free.
ArcGIS Desktop Tutorials
ESRI ArcGIS Desktop and ArcGIS Extensions come with tutorials and tutorial data to help you learn to use the software. You can open PDF versions of the tutorials, or to view animations based on the tutorials.
ArcGIS Desktop version 9 Introductory Tutorial
This tutorial was designed for ArcGIS Desktop version 9 ArcInfo™ Functional Level (includes ArcView® and ArcEditor™ functionality). From the University of Arkansas Libaries.
How GPS Receivers Work
Go through this "How Stuff Works" site and get a better understanding on how a GPS receiver works.
GPS Video – How Stuff Works
Watch this video at "How Stuff Works" site and get a better understanding on how a GPS receiver works.
GPS Tutorial from Trimble
GPS is a complex technology but understanding it can be quite easy if you take it one step at a time. This tutorial is designed to give you a good basic understanding of the principles behind GPS without loading you down with too much technical detail.