You can access assignments from the lecture page or from your course homepage.
Once you have clicked on the assignment, select "start a submission" to open submission:
Once you have started the assignment, you may file in the fields or upload your documents from your computer by clicking 'Choose File'. Occasionally, if the assignment has the option to be made public, you can adjust your submission privacy level.
To submit your assignment, click the 'Submit'.
To confirm that your assignment has been submitted, look for a green check above the assignment title:
You can also check all your submissions in your dashboard.