Migrate data from your New School Google Apps account to another Google account. Here's a list of data transfer options available for Google Apps:
Lifehacker provides detailed instructions to help you to move your mail from New School Google Apps to your alumni account.
Export each individual calendar to an .ics file from your New School Google Apps account and then import in New School Alumni Google Apps.
Export/import CSV files, but use the Google contacts format to preserve all information.
See our instructions on how to move your Google Docs to New School Google Apps.
You can share individual sites with another Google address and then copy the site.