Step 4: Begin the first row of single crochet
Now catch the yarn in your left hand with the hook (pic 3) and draw or pull it through both loops of the stitch (pic 4). This will leave you with 2 loops on your hook (pic 4).
Catch the yarn in your left hand with the hook again (pic 5) and draw or pull it through both loops on the the hook (pics 6 and 7).
Repeat these steps until you get to the end of the chained row. Then, chain one stitch and turn your crocheted row over.
Here is CrochetMovie2 demonstrating how to crochet to the end of row 1: