Jim Loy
Jl's Math Page: The Golden Rectangle and the Golden Ratio
This is a personal site from Jim Loy that describes the golden rectangle and the golden ratio. Includes several diagrams and pictures as well as formulas. A good background in math is helpful.
McGraw Hill
Glencoe: Interpreting Data Quiz
This is a quiz with five quick questions to check your understanding of how to interpret data. It is self checking.
McGraw Hill
Glencoe: Collecting and Analyzing Data Quiz
This site is a quiz with five quick questions to check your understanding of how to collect and analyze data. It is self checking.