How many words do you think you know? This interesting website is part of an American-Brazilian research project, and gives you an estimate for how many words you know following a short two-stage test. It's free and gives you a result immediately when you finish the test, which might take up to 10 minutes.

howjsay . com

         A free online Talking Dictionary of English Pronunciation   

Cайты с ИНТЕРАКТИВНЫМИ упражнениями. 

Их можно использовать для самостоятельной работы. Выполняя задания, вы увидите результаты своей работы.

• Interactive Grammar Exercises:

Adjectives and Adverbs

Irregular  Verbs

Do vs. Make

Say vs. Tell

Nouns

Transitive and Intransitive Verbs

Verb Tenses I (Simple Tenses)

Verb Tenses II (Complex Tenses)

• Gerunds and Infinitives Tutorial

• Language practice

• Word Building 1
• Word Building 2
  
• Vocabulary and collocations
  
• Confused Words
• Phrasal Words