My angry teacher

Last year,one day in my grade 9 class my friends and me were talking to each other and my teacher was sitting on the chair.

On that day was my friend's birthday and also the day that we had a test,too.I though,the day was my best friend' birthday,so we should had a party while the test already.After I thought already my teacher told we,that we should had a test,now.We did a test all together.One hour later we did a test already and we had a break.And the teacher went out.On break time we did a party but we did not told the teacher.After we did a party already in our class was so messy.A few minute later our teacher came back and he saw a class so messy.I looked to his face was so red,I thought that he was angry.The teacher told we to clean the class.Twenty minutes later we clean the room already,the teacher said"You should go back to your sit". My teacher' face was so very very angry.He sit on his chair,he did not say anything.A few minute later he started to say that in our test was better than before,but he stayed angry.I went to ask him"Why was you angry"?. He said that we did a party did not tell him.And I said"Sorry"next time we will tell you.