Knit two stiches so that there are two stiches on your right needle. Insert your left needle into the first stitch on the right needle, pull your left needle up and to the left so that the first stitch is pulled over the second and off the tip of the right needle. One stitch remains on the right needle and one is now cast off! Knit another stitch. Again, there are two stitches on your right needle. Repeat the steps to cast off the stitches until all are cast off.