BBC
Bbc: Bitesize Geography: Os Map Skills
A short tutorial on mapping tools and how to read maps. Covers features of maps, symbols, the compass, scale, distance, how height is represented, and grid references. Includes multiple-choice quiz at the end.
Other
Centre for Topographic Information: Map Scale
This resource uses illustrations to demonstrate scale. Check out the links to the The National Topographic System of Canada and the Aerial Survey Data Base.
University of Colorado
University of Colorado: Error, Accuracy, and Precision Exam
A university exam on the topics of error, accuracy, and precision. Includes essay, short answer, and multiple-choice. Links to lecture and discussion notes. Answers to short essay and multiple-choice are provided.