Not sure if this app is also free for Google Apps for Education users? If not, it costs £5.49 inc. VAT.

Source: iTunes Store (via Google Enterprise Blog)

Since the Quickoffice team joined Google a few months ago, we've been working to make it easier for you to work with your legacy Microsoft Office files -- both by converting them to Google documents and by editing them directly in Quickoffice.

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Using Quickoffice to edit Office files on your iPad
Converting old files to Google Docs, Sheets and Slides is the easiest way to share and work together, but perhaps not everyone you work with has gone Google yet. To complement what you can do with Google documents, we’re also making it easier for you to make quick edits to Microsoft Word, Excel and Powerpoint files without conversion. Starting today, the Quickoffice iPad app is available for free to all Apps for Business customers, and iPhone and Android versions are on the way. With the app, you can open and edit any Office files you've stored in Google Drive right from your iPad.

Whether you’re converting Office files to Google documents or you just need to make a couple quick edits without converting, it should be easy to get work done whenever you need to, on any device. Stay tuned for more document conversion and mobile editing improvements in 2013.