Dear Mr. Jimmy Ashton,
I can remember your history of academic results since your enrollment in the school. It was more than satisfactory. However, your recent academic reports are marred by poor grades in all subjects except English literature. Such an academic performance is neither satisfactory nor acceptable here. Your persistent lack of interest in your studies is not only harming your career but also wasting precious money of your parents along with ridiculing their hopes for your future.
I am warning you that you must not continue with such poor academic performance and lack of diligence in you studies. In other case, I am afraid you shall not be able to continue your further studies here. As you know that there is no compromise on the standards and quality of education in my school. Same applies on the performance of students.
I am looking forward to hearing good news regarding your academic reports.