Find free tutorials and instructions for working various Tunisian crochet stitches.
The Tunisian knit stitch is so named because it looks like knitting; the right side of the fabric resembles knitted stockinette stitch (AKA stocking stitch.) I've encountered people who refer to this technique as "knitting with a crochet hook." That way of describing it isn't entirely accurate, because the resulting fabric is structurally different than a knitted fabric; it's thicker, and it has less stretch. Still, there's no arguing that the fabric looks knitted, and if you are interested in achieving a knitted look with your crochet work, this stitch is a good one to have in your repetoire.
Want to make seamless tube-shaped crochet projects using afghan stitch or other Tunisian crochet stitches? I've rounded up links to videos and tutorials teaching you how to do this intriguing technique: Tunisian crochet in the round.
Rectangles and squares are great, but there are going to be times when you want to create some shaping in your work. For those occasions, it's helpful to know how to increase and decrease in afghan stitch.
Angela Grabowski, AKA "ARNie," has shared instructions for many different Tunisian crochet stitches on her website.