Contributors will only have permission to edit their own departments web pages. If a Contributor tries to edit a page they do not have permission to edit... some stuff here.
There are two ways you can find your pages:
Method 1: Type in the page you are looking for in the address bar.
Method 2: Make sure the navigation bar is open and use the arrow as seen below to select the page you want to go to. Continue to click the arrow until you've reached the page you'd like to edit and then click GO.