McGraw Hill
The Units of the English System
Go from feet to inches to yards and back again with this notes and activity combo resource. Several pages of examples regarding unit conversion of the English system are given, followed by different pages of problems. There is a nice...
Khan Academy
Khan Academy: Ratio Tables
Explains what ratio tables are. Includes simple examples and a few practice problems.
Quia
Ixl Learning: Ratios
Brush up on your math skills relating to ratios then try some practice problems to test your understanding.