Some open response assessment (ORA) assignments include a training step, so that you can learn how to effectively assess responses for a later peer assessment step.
In a training step, you evaluate example responses using a provided rubric as a guide for grading. After you complete the grading, you are shown how the grades you gave differ from the grades that a member of the course team gave. The goal is to learn how to assess responses similar to the way that course staff would assess them, using the same rubric.
When you have successfully assessed the sample responses, the next step in the assignment becomes available.