To view and grade homework submitted by your students, go to 'Homework'-'View All'

This opens the homework list page

Click the 'View All' button for any homework you will like to view. This opens a page like this:

You will see the total number of passed and failed submissions as well as the average score.

To view and grade a submission, click on the 'View Entry' button for that submission:

The 'Grade' section at the bottom of the page is where you treat a homework submission. You can enter in a comment, the grade as a percentage and the status of the homework. If you set the status to 'Graded', they student will no longer be able to modify the homework.

There is also a 'Notify student' checkbox. If selected, the student will be notified by email immediately the homework is graded.