He may be loud, but he's my student

He is LOUD! His laughter annoys me for the first 3 quarter of the year.
He played truant during my class for nearly a month.
He hardly wanted to try any exercise.
He played paper football with his friends in my class.
He openly bullies other kids while I'm teaching.
But he is my student.

Now, a statement he said to another kid in class, that is still ringing in my ear,
"Tak nampak ke saya tengah belajar!"
while I was sitting in front of him, going through his Math Paper 2 and his overall progress this year, with him.
He may not improve much, and he did not even pass his paper.
But the disappointment from his eyes about his result impacted me.
He changed, and so did his life path.