In many schools, you get free Office 365 to all students and staff but if you own a Chromebook laptop or chromium netbook, you can still make some use of the Microsoft Office 365 subscription. Here is how.
First, go to this page and log in with your information provided by your school https://login.microsoftonline.com/ or if you want to use your personal email address, use this URL https://products.office.com. Login and you will be taken to page that looks like this.
Here you can see that with Office 365 subscription, you get 1TB cloud storage. This is great compared to the storage non-Office 365 users get which is meager 5GB. You can use OneDrive.com for storing your personal data which can be accessed from any laptop, desktop or smartphone out there. Microsoft has excellent apps for windows phone, iPhone and Android phones.
Office 365 allows you to install full offline suit on Mac, PC, Windows Phone, iOS or Android. Sadly Chromebook bring a direct competitor to Windows laptops, is not supported. Check out the cheapest chromebooks of 2015.
However you can use the Office 365 online suit instead of Google’s office suit. It works great online. For that, you can go to https://www.office.com/ and get access to variety of Office apps.
You can download the document after working on them for later use as well. Or you can keep them saved on to your OneDrive account. In fact, your recent documents are shown on the left pane as well. For instance, in the below screenshot you can see how all of my Word documents stored on OneDrive show up on the left pane in Microsoft Word Online.