这两句话到底怎么翻译啊

1。上课了，请同学们进教室坐好，等待老师上课。
Class begins! Students! Please enter the classrooms and sit down, waiting the teachers.
2。放学了，请同学们整队离开校园，不要在校园逗留，放学路上注意安全。
Class is over. Students! Please line up and leave the school. Don't stick around in school. Be careful on your way home.

1.When the class began,plese stay in the classroom and wait for your teacher.

2.when the class overed,plese line to leave the school and take attention when way home,don't stay at school.

1.please be on your seats waiting for teacher when class is start.
2.please leave school in queue,don't linger after class,Take care of yourselves on your way home