What is shift stitch crochet?

Is single crochet stretchy?

Single crochet in the back loops, stretches really well and gives a knit effect.

Does using a bigger crochet hook use less yarn?

If you are using the same pattern (same number of stitches and rows/rounds), a larger crochet hook will use up more yarn. If you are going for the same size of project (say a 36 by 36 inch blanket), a larger crochet hook will use up less yarn.

THIS IS FUN:  You asked: What can I knit with 200 yards of bulky yarn?