Here are some great study links to websites where you can develop your English effectively on your own:
British Council site – Includes magazine; grammar & vocabulary tests; games; sport and culture, etc. Listening pages also have reading (audio script), comprehension, language and writing activities.
Very rich BBC World Service site with News English; Business English; Watch and Listen; grammar and vocabulary etc. Includes audio, video, quizzes interactive activities, etc.
Various interactive grammar and vocabulary tests for students at different levels, including TOEIC and TOEFL, but site also has lots of advertising and links to pay sites.
Free grammar exercises, tutorials, and vocabulary games and listening.
Free online grammar & vocabulary exercises and games. 4 Levels from beginner to advanced. Reading practice and a weekly podcast.
Listening and speaking resources. Links to external sites with English for specific purposes such as business. Also contains advice for using search engines to find EFL materials.
For anyone who wants to improve the writing skills. Brings to your attention hints on effective resume and cover letter writing, making a presentation.
Helps you improve your grammar and vocabulary using crossword puzzles.
Rich site with help on grammar; idioms; phrasal verbs; pronunciation and slang using quizzes. Helpful when studying English as a second language.

Free online English exercises and games. Practise grammar, vocabulary, pronunciation, listening, and reading

Support forCambridgeFCE, CAE & CPE Exams. Includes advice and exam tips, printable exercises and practice tests with answers, online tutorials from professional teachers with exercises and model answers for the writing exam. Plus vocabulary building exercises in the word bank specifically geared to these exams. LOTS of help and support!
Information on ALL Cambridge ESOL exams with summaryof exam components and exam/registration dates and centres. Free downloads available of Handbooks, Guides and Sample Papers, Candidate Information and Exam Reports. (Listening samples can be downloaded to MP3). Note: No free sample papers for IELTS.
Detailed information about IELTS examinations. Information provided on exam dates registration, fees and centres. The IELTS handbook can be downloaded free of charge but sample and practice materials must be ordered and paid for through the site.
Exam info and practice exercises for Cambridge Exams and TOEFL. General English exercises and useful online pronunciation course. Also has a wide variety of games and activities though these are not strictly related to exams. Also has free online courses in 4 levels with grammar tutorials and vocabulary.

Academic English