i'm having trouble understanding these instructions:
Row 1 (right side): Knit into front and back of this stitch 3 times (6 stitches).
Rows 2 and 4: Purl.
Rows 3 and 5: Knit.
Row 6: (Purl 2 together) across row. (3 stitches)
Row 7: Slip 1 stitch knitwise, knit 2 together, pass slipped stitch over last stitch.
i don't get how to knit on the front or back of stitch. what does that mean?