To improve your English from junior high to high school, focus on the following strategies:

1. Build a strong foundation: Review basic grammar and vocabulary regularly. Use flashcards or study apps to memorize new words daily.

3. Practice speaking: Find language exchange partners or join an English club to practice speaking English with native speakers or peers.

4. Keep a journal: Write down your thoughts, feelings, and experiences in English every day to improve your writing skills.

6. Seek help: If needed, consider hiring a private tutor or joining an English course to get personalized support and feedback.

By consistently applying these methods, you can gradually improve your English skills and succeed in high school.