To quickly improve your English proficiency in junior high school, you can follow these steps:

1. Set a goal: Determine what you want to achieve, such as passing an exam or improving conversational skills.

3. Practice grammar: Focus on common grammatical structures and practice by writing sentences or taking online quizzes.

4. Immerse yourself: Listen to English music, watch movies, and read books to familiarize yourself with the language's sounds and patterns.

6. Keep a journal: Write in English every day to improve your writing skills and reflect on what you've learned.

7. Seek feedback: Ask teachers, friends, or family members to correct your mistakes and give you advice.

8. Review regularly: Make sure to review what you've learned to solidify your knowledge.