Crochet Basics 

Chart Symbols (1:35)
How to Draw a Chart (3:25)
     Reading a Chart Worked Flat (6:28 9:53 15:56)
          http://www.abc-knitting-patterns.com
          http://cup-of-stitches.blogspot.com/2012/11/tutorial-crochet-chart-reading.html
     Reading a Chart in the Round (13:22)
          http://www.simplycrochetmag.co.uk/2012/04/29/granny-square-patterns/