In order to learn this stitch you must have a working knowledge of the front post double, double crochet, and triple crochet.  If you are not familiar with this stitch I would suggest you clink on the link and look over the front double crochet tutorial before attempting this one.

The Double Crochet

Triple/Treble Crochet

Front and Back Post Double Crochet

Until next week, keep those hooks flying.