Step 1: Materials Needed
-Circular needles in the size appropriate for your yarn, at least 36 inches in length (but the longer, the better)
-Knitting place marker
Step 2: Cast On
Step 3: Work Pattern
Knit the following pattern, using as much of your yarn as possible:
Rows 1-3, purl all stitches.
Row 4, purl 1 and wrap the yarn around the needle an additional 3 times; repeat until the end of the row.
Row 5, purl 1 and slide the wrapped yarn off the needle; repeat until the end of the row; gently stretch the dropped stitches when finished with the row.
Row 6 onward, repeat Rows 1-5 until almost all the yarn has been used. End the scarf by purling three rows and casting off.
Check out this useful YouTube video for a visual on how to work the drop-stitch technique: http://www.youtube.com/watch?v=o5x6HeNX7-s