The Timmel Fabrics website is long-gone; however, their knit lesson pages, written by the shop owner, were cached online. Here are four links to the straightforward and helpful lessons, complete with illustrations, that I often send to those looking to sew with knits.
Lesson One, knit fabric types, needle and thread choices, fabric layout guides
Lesson Two, sewing knit tops’ shoulders & many neckline finishes
Lesson Three, sleeves, sleeve hems and shirt hems; and
Lesson Four, adding a rugby neckline.