Using English for Academic Purposes
This is a great resource on the Academic Word List with links to definitions as well as other practice activities.
The academic word list (AWL) contains 570 of the most important words that will help you to be successful in your studies.
Start at list 1 & 2 and use the games and quizzes to help you check that you really know these words and can use them effectively. Then continue with the other lists. You'll be surprised what a difference ten minutes a day can make!
Coxhead A (2000) 'A new academic word list', TESOL Quarterly, 34(2):213-238, doi:10.2307/3587951.
Coxhead A (1998) An academic word list, ELI Occasional Publications 18, School of Linguistics and Applied Language Studies, Victoria University of Wellington, Wellington.