A thesis statement is a clear statement of your position in an argument essay. It sums up your topic, your position, and a brief "why" for your argument. This sentence generally appears at the end of your introduction.
Created by the University of Manchester, the Academic Phrasebank is "a general resource for academic writers. It aims to provide you with examples of some of the phraseological 'nuts and bolts' of writing organized according to the main sections of a research paper or dissertation."
This guide by the Harvard College Writing Center provides step-by-step explanations on developing academic writing. It covers topics such as choosing a topic, developing a thesis, revisions, and grammar tips.
This blog, run by a faculty member at the University of Toronto, is a discussion of the challenges of academic writing. It covers strategies for planning writing, the mechanics of writing like punctuation, and advice specific to graduate writing.