Before you can add or edit content, you usually need to log in. If you haven't already done so, register as a user (see instructions in this Guide). Then visit the Class of 1985 website at dartmouth85.com and look for the two login fields in the upper right corner of the home page. Enter your username in the left block and password in the right block and click "Login".

Assuming everything's working as planned, when the new page loads the login form will change to "Hi [username], welcome back". The left-side navigation menu will now include some new items, and your username will be at the top. This is the menu you use to start entering and editing content.