I met Bob Whitney, as a graduate student. I can't remember the name of the course, but he taught it, in his unique way of teaching. Perhaps, "facilitated it" is the better term, I think he allowed us to teach ourselves. I'm not sure he ever graded any of the work we'd submit, though we worked hard and had many assignments. The lack of grades and feedback somehow caused us, the grade-conscious graduate students that we were, to work even harder. We were like crazy people, not knowing how well or poorly we were doing, we kept chasing the invisible, unknown carrot...raising the bar, if there was a bar. We worked like mad. 

Bob talked a lot about metacognition. We thought about our thinking and wrote about our writing. We pushed harder and deeper, constantly constructing and deconstructing our ideas. It was amazing and frustrating. But we grew. Somehow we managed to grow. 

I think "loop writing" is a technique created by Peter Elbow, maybe in "Writing Without Teachers." Maybe. That's a big maybe. But I know it's from Peter Elbow. 

Begin by writing about a topic of idea. You can choose a time frame (5 minutes always worked nicely for classes I've taught) or write a paragraph. Then stop and circle or underline or highlight the sentence(s) that stand out for you. Then begin your next paragraph/5 minutes of writing with the that idea. Once finished, do the same thing. Identify the sentence(s) that really stand out for your your and circle or underline or highlight the sentence(s). Move on to the next "loop." 

I've done it for five (5) loops or for 15 minutes. Either way works. It's a much loved technique.