I forgot to watch a very important game and sent a text message to the class teacher to apologize. The class teacher was slow to respond.

You can forget a very important game, which shows that your heart is quite big, and the class teacher must be very disappointed. His non-return represents anger and disappointment, and he doesn't want to return; Second, he has to take remedial measures and has no time and energy to reply.

In addition, you don't call but send a text message on such an important matter, which shows that you don't value and respect people. Call to apologize and explain.