To view any grades from assessments go to the Navigation block (click on the hamburger icon in the top left corner if this is collapsed) and click on Grades. This will show you a list of all grades that your convenor has made available to you. You will see a table that displays a Grade, a Range, a Percentage and any feedback that has been filled in.
You can also access grades and feedback for iLearn activities by clicking back into the link for that activity. Note that your lecturer may not have released certain grades to you yet, or they may not be using iLearn to record grades for that unit.

Other resources:

Student Guides