To achieve a score of 115 in junior high school English, you should focus on the following aspects:

1. Vocabulary: Regularly learn and review new words to expand your vocabulary. Use flashcards or mobile apps to help you memorize words more effectively.

3. Reading Comprehension: Read English articles, books, and stories to improve your reading speed and comprehension. Try to understand the context and author's intention.

4. Listening: Listen to English audio materials such as podcasts, movies, and songs to practice your listening skills. Repeat what you hear to improve your pronunciation and intonation.

6. Writing: Write essays, diaries, or letters in English regularly. Get feedback from teachers or peers to identify areas for improvement.

By focusing on these areas and dedicating time to practice daily, you can achieve a score of 115 in junior high school English.