Twined knitting is a traditional Scandinavian knitting technique dating back at least to the 17th century in Sweden. You use two strands of yarn -- knitting each strand is alternately and twisting them between each stitch. It's called tvåändsstickning in Swedish and tvebandsstrikking in Norwegian -- both meaning "two-end knitting"-- because traditionally the two ends of one ball of yarn are used. The resulting fabric is firmer and denser than regular stockinette stitch and makes for wonderfully warm knits.
Jeffrey Wall of the Yarn Guys will teach this three hour session from cast on to completed mini mitten all while showing students how to master twined knitting.