The assessment model of an assignment defines how your collection will be assessed. It's good to be aware of this while working on your collection, so you can view the assessment model at any time.
To do so, first navigate to your collection, then click on the 'Assessment' tab or the end of the timeline.
As can be seen in the example above, multiple rubrics may be available. If this is the case, your teacher can inform you which of these applies to you.