Question

Teacher said, "You are all good children. "  (Change into indirect speech)

You are all good children said the teacher.

Teacher said that they were all good children. 

Teacher said that you are all good children. 

Teacher said that we are all good children ​

Answer 1

Teacher said that we were all good children. 

Note: Reported speech must be in the past tense.

Hope it helps.

Answer 2

Answer:

Teacher said that we are all good children