JCU Study Skills Online
This site takes you through the process of writing from analysing a question to final editing. It also provides very useful sample essays with criteria for assessment and lecturers' comments.
The Royal Literary Fund
Essay Writing: A Guide for Undergraduates. A useful and comprehensive guide to many different aspects of academic writing at this level.
Victoria University of Wellington
A series of interactive exercises that focus on paragraph structure in academic writing.
Using English for Academic Purposes: A Guide for International Students
Comprehensive advice, materials and exercises on the four skills. Produced by Andy Gillett, Department of Modern Languages, University of Hertfordshire, Hatfield.
Hong Kong Polytechnic University
This link to the Honk Kong Polytechnic University takes you firstly to a list of skills and functions associated with 'Essay Writing'. These include Explanation of Functions, Describing Trends, Cause and Effect for Developing Academic Writing Skills, and more. There are further useful categories such as Participating in Academic Discussions and Giving Oral Presentations. Follow this exercises link if you want to do some practice work on many of these.
Randall's Cyber Listening Lab
Go down the page and try some of the "Listening Quizzes for Academic Purposes."