Research on student reflection highlights the need for guided support, whether from the instructor or a mentor Gardner amp Belland, 2012. An assessment rubric helps support this process. The grading grid for the reflection assignment was based on four criteria: understanding, reflection, practice of proofs and coherence of structure. Such essays are usually given as homework to students at school. KB 20. MB 21. KB 22. KB 23. KB 24. KB 25. If the reflective essay is a school assignment, your teacher will probably specify what you need to write about. Research on student reflection highlights the need for guided support, whether from the instructor or a mentor Gardner amp Belland, 2012. A rubric helps support this process. The marking grid for the reflection assignment was based on four criteria: understanding, reflection, practice of proofs and coherence of structure.