Binding off some, not all...

[erikalee]

I am making a "Halfa", it's a half of a sweater, from the 2008 Knitting Calendar.

The directions say:

Back & Front:
1. Cast on 60 stitches.
2. Work in desired pattern (I chose K1,P1) for 8'' or desired length.
3. Use the three needle cast off technique to bind off 15 stitches at the beginning and end of this row.

Neck:
1. Plac 60 stitches (30 stitches from front and 30 stitches from back) on a circular needle and work in garter stitch for 6''.
2. Cast off.

My question... what the heck does that mean?
I have made 1 panel so far, but no idea what to do with it now. Do I make another panel on a separate needle? And what about the tail yarn and where do I get new yarn to keep knitting the neck piece?

I am totally confused by this pattern... probably not a good one for a beginner, but I'm adventurous.