Lǎoshī jìnzhí jìnzé de guānxīn měi yī gè xuéshēng.
The teacher conscientiously cared for every student.
Tips
memory
职 means 'duty/position' and 责 means 'responsibility.' Both are preceded by 尽 (to exhaust / fulfill completely) — so the idiom means to completely fulfill both duty and responsibility.