Check out the video for "Bar increase" (k1f&b) on THIS PAGE
about half-way down. Do the same, except you will knit, then purl then knit ALL IN THE SAME STITCH. The video will show you how to knit several sts into one. You leave the st ON the left needle in between.
And, yes, "turn" means just that. You turn your needles around to re-knit the same three sts you just knitted.