I need patience.

It's nearing the end of the semester and I'm starting to lose patience with some of my students. I'm beginning to become a bit snappy with them. Please pray for me that God will grant me the patience I need for the rest of my semester.
It really bugs me when my attitude becomes like this because my students are seeing me and not seeing Christ through me. So please pray that I won't be frustrated when I have to answer the same question four times in a row!