If there are particular websites that are the problem block them in the router. If things like e-mail or FarceBook are a distraction delete the accounts from her laptop.
Download as much of the reference material as possible so it can be accessed locally then disable wireless. The word processor spellchecker should be able to help with the spelling, buy a decent physical dictionary & I expect she can spell specialist words specific to the subject matter.
Here's a novel idea - hand write the draft.