The Longman Vocabulary Website
Topics such as "Synonyms," "Antonyms," "Homonyms," "Easily Confused Words," and "Using Context Clues" allow users to practice vocabulary development with interactive quizzes. Select an appropriate range of difficulty, from beginner to advanced, and find between 8 to 10 quizzes at that level for each topic. As a bonus, click on the link to "100 Words That All High School Graduates Should Know" and see how many you've mastered.
• Learning Games
• High School Middle School Elementary School