Approximately 30 yards of smooth worsted-weight yarn in each of two solid colors that contrast, needles in a compatible size (usually US #7-9) with which you will be knitting flat, needles one size larger than the ones you use for knitting worsted weight yarn, also for knitting flat, and a cable needle. Optional: If you would like to explore how these woven stitches affect variegated yarns, also bring approximately 30 yards of a variegated yarn. 
Note: The yarn requirements for this class are not intended to be onerous or to require purchasing new yarn, but to hopefully make use of some leftovers in your stash. If doing so means you need to work with a different weight of yarn, DK, Sport, and Aran weight yarns are all suitable. Please choose your needle sizes accordingly, and make sure all the yarns are the same weight.