Obviously, the head teacher is not a victim, so don't worry. And the class teacher doesn't want to help the student. So the class teacher said that the students lost things themselves and wanted to roll with the punches.

Since the head teacher's attitude is here, there are only two ways. First, since the teacher wants to roll with the punches, let the students, parents and the class teacher work it out together, and then finally get a result (but if there is no strong evidence, then this is a headless case. There is no result. )

Second, if you have a clue, but the class teacher still insists that the students lost it themselves, then you can tell the school leaders that the class teacher has violated Article 4 of the Regulations on Disciplinary Treatment of Primary and Secondary School Teachers, playing with right and wrong and framing others. Then the class teacher will criticize lightly and punish severely.

But as far as the reality is concerned, since it is impossible to reason with the class teacher, the easiest way is to inform the school leaders and communicate with them directly, and then investigate whether the students' belongings have been stolen, and then deal with the class teacher's problem after the result is determined.