Wrap the yarn from back to front over the hook (or hold the yarn still and maneuver the hook). This movement of the yarn over the hook is used over and over again in crochet and is usually called "yarn over", abbreviated as "yoh". Check out these stitches that use the yarn over hook movement: Bobbles Single crochet two together stitch (sc2tog) (also known as a single crochet decrease) Double crochet back post (dcbp) Double crochet front post (dcfp)