There are many ways for Students to reflect and record their learning. However, in PE, down on the field, I often find it results in crumbled bits of paper with a big footprint, that we then end up sticking photos of the students on to so they can use in portfolios.
For our Striking and Fielding unit this year, I produced rubrics, with each level on a different peice of card and asked the students to stand behind the ones that describes their performance and undestanding of the concepts the best. Next up, a quick photo of each group taken on my ipad, which was then annotated using skitch on the bus ride back from the field, before emailing the photos to the students for them to upload onto their blogs. Much quicker on the administration side and no footprints in sight!