I am a well-mannered, warm hearted student, with a good relationship with my teachers and classmates. I have a sound interest in Chinese and possess a good oral Chinese. My strong point lies in Mathematics, though I sometimes make mistakes due to my carelessness. Overall, I am a very good student.
如果是一个一个词语的翻译的话,应该是：
讲礼貌：polite
乐于助人： warm hearted
与师生相处融洽：have a good relationship with teachers and students
对汉语很有兴趣：have an interest in Chinese
口语很好：speaks good oral Chinese
擅长数学：good at mathematics
每天做很多题：do a lot of exercises every day.
但不够细心：but careless
是个很好的学生：be a good student