Links to further advice on how to improve your written English
Here is a comprehensive guide to using punctuation provided by the University of Sussex
This guide for Academic Writing for university students contains some good advice on spelling, as well some useful spelling exercises.
The Internet Grammar of English designed by University College London provides a glossary of grammatical terms as well as explaining all the main rules of grammar clearly.
General all-round useful resources
These two resources aim to help you improve all aspects of your writing style.
When checking your paper for punctuation, grammar and spelling mistakes remember you can do a spelling and grammar check with Microsoft Word. Although Word cannot tell you the right answer, it will point out problematic areas and make suggestions for improvement. It is up to you to take note of these areas and make the correct changes.