I recently had a more specified query from an International student than just about grammar and writing in a foreign language. The writer specifically wanted to know how to make their writing more academic, and how to cope with academic terminology. On the side of their subject, I suggested a formal glossary, as well as that they create their own version as they experience more of their subject over time. On the academic writing side, then, I managed to find a couple of well-structured and accessible e-books which may be of use to someone in this position:
Academic Writing A Handbook for International Students.
Florence : Taylor and Francis 4th ed. 2014
A Student’s Writing Guide How to Plan and Write Successful Essays.
Cambridge : Cambridge University Press 2009
In fact, the way in which they are both set out might be useful for anyone who struggles to get their head around the rudimentary info, such as what a dissertation is as opposed to an essay, or how to break apart a question, for instance. The first book also includes a fun little quiz on expectations of what academic writing really is.