Not quite sure what you're getting at? Do you mean the complete Hub with headers and pictures and perhaps even a video? Or do you just mean the written text? If it is the latter,why don't you simply create as a Word doc and send it to a friend or friends to look at. They can possibly evaluate and edit it, and then send it back to you.
Once you have the received doc back, you simply cut and paste into the Hub page. You can then add the pictures et cetera after you've done that.
All my Hubs were created firstly by creating a Word Doc, and then adding it into Hubpages. Once it's done, view it In Hubpages and, if happy, publish it.
The beauty of this, is that you can save that printed text as an essay. If you decide to delete it from Hubpages and use it elsewhere, then you've still got the document saved.