A feedback sheet where students can immediately create evidence of progress.
This is easily adapted to any subject, it currently goes from F-B as I'm using it for key stage 3, but it is easily amendable.
Complete their www, ebis and 'do now's on the left, then they complete their directed reflection and improvement time (DIRT Time) action on the right.
Stick it in their book, jobs a good'n.
Many more inexpensive and free resources at my shop: EC_Resources
Leave me a review and pick any other resource for free :)