Purling through the back loop twists the stitch. Insert the right needle into the front of the stitch from right to left as shown and continue to purl the stitch. Insert the right needle into the back of the stitch from back to front and continue to purl the stitch.
Knitting through the back loop twists the stitch. Insert the right needle into the front of the stitch from front to back and continue to knit the stitch. Insert the right needle into the back of the stitch from the front to back and continue to knit each stitch