Fusion TablesFusion tables have finally come to Google Apps for Education. These are quite cool and allow data sets - both private and public to be merged and visualised in a number of ways. You can make a Fusion Table by going to your drive and clicking on 'Create' 'More' and Fusion Table. You can also add it as a Chrome App.
This is still in beta, so some of the features could well changes.
You can add data-sets from Google Sheets or csv files. You can merge Fusion Tables, specifying the fields to match - essentially creating a relational database. The data can then be displayed in a number of way. Note the options differ if you are using the new or the old look.
One I did earlier - oil production by country - not perfect - but only took a couple of minutes!
If you want to know more go to the Google documentation on this.