To improve your English skills in high school, focus on these key areas:

1. Vocabulary: Regularly study new words and phrases to expand your lexicon. Use flashcards or an app like Anki to memorize words.

3. Listening: Listen to English audio materials, such as podcasts, movies, and songs. This will help you pick up accents, idiomatic expressions, and conversational patterns.

4. Speaking: Practice speaking English by participating in class discussions, joining language exchange groups, or using apps like HelloTalk. Don't be afraid to make mistakes; practice makes perfect.

6. Grammar: Review English grammar rules regularly. Use resources like online tutorials or grammar books to strengthen your foundation.

By focusing on these areas and practicing consistently, you can significantly improve your English skills in high school.