To improve your child's English proficiency in junior high school, focus on the following aspects: 1. Vocabulary: Encourage your child to learn new words daily and use flashcards or an app like Anki to practice.

2. Grammar: Go over basic grammar rules regularly with worksheets or online resources like Khan Academy.

4. Listening: Expose your child to English audio materials like podcasts or educational videos to improve listening skills.

5. Speaking: Encourage conversations with family and friends, role-playing exercises, or joining English clubs to practice speaking.