Click on the links to learn about ratios:
Link #1-Purplemath
Link #2-Math.com
Link #3-Webmath
Link #4-Math League
Link #5-Regents Math
Link #6-Math for Morons (ratios/proportions)
Link #7-Thinking Blocks
Link #8-BBC-lesson, interactive game and activity, quiz, worksheet)
Link #9-BrainPop (video)