If you log into your course in myLesley, and don't see the sidebar on the left-hand side, then you can expand the sidebar. The sidebar might collapse if you are on mobile device or tablet, because of the small browser window. Another reason for the sidebar collapse is that you might have the browser window zoomed in.
If you screen looks like this it means that your sidebar on the left is collapsed:
Expanding the sidebar
Hover your mouse over the blue line on the left. You will see an arrow appear. Click on that arrow.
You'll now see the left-hand menu as in this example.
Note: If you don't see the blue bar to expand the sidebar, try enlarging your browser window.