Using Multiple Google Accounts
if you're already using google apps
If you already have a Google account separate from your BC Google Apps for Education account, you can work with them together.
Google does support multiple sign-in on the same browser, and instructions are available here.
Even if you do link accounts using multiple sign-in, your data (i.e. Google Docs) does not merge. BC ITS found logging into different browsers, rather than multiple sign-in in the same browser session, to offer a better experience.
You can, however, move data from one account to another. See Moving Google Data for more info.