My mil is the only person IRL who knits, but I can't ask her... The learn to knit book I have says to cast on by knitting 2 stitches, then cast on more by putting the right needle between 2 stitches. Mil says she "knits on" by knitting into the back of the previous cast-on stitch, then putting it on the left needle to cast on. Is one technique better than the other, and why or why not? TIA!