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

1. Vocabulary: Consistently expand your vocabulary by learning new words and phrases every day. Use flashcards or an app to help you remember them.

3. Grammar: Practice grammar rules regularly by doing exercises and reviewing common mistakes. Consider using a grammar book or online resources for guidance.

4. Writing Skills: Write regularly, whether it's journal entries, essays, or letters. Pay attention to sentence structure, coherence, and clarity. Get feedback from teachers or peers to improve your writing skills.

By focusing on these areas and practicing consistently, you can achieve a high score in English in high school.