Please watch the following video tutorial on learning the purl stitch on needles. (for more information on yarn and needles chosen please visit the overview video).
Beginner Needle Knit Series overview http://youtu.be/TkaSfY8NfdY
How to Knit – Cast On Beginner (with closed captions) http://youtu.be/nWJQvsZ6kT0
How to Knit – Knit Stitch Beginner (with closed captions) http://youtu.be/x4kSztvq-vI
How to Knit – Purl Stitch Beginner (with closed captions) http://youtu.be/lkb0YyrzPWA
How to Knit – Bind Off Beginner or cast off http://youtu.be/TMAUORm-GK4
How to Check Knitting Gauge or measure gauge http://youtu.be/HCjapH8LO_I