My daughter is 14 years old and she told me that...

You should urgently go to the nearest police station or public prosecution office in Tunis and file a complaint against the teacher. This complaint will be confidential. The matter will be investigated and after the crime is proven, the teacher will be punished according to the provisions of Tunisian law.
As for the penalty, the Law on Elimination of Violence against Women in 2017 raised the penalty for sexual harassment from one to two years in addition to the increase in the fine from 3 to 5,000 dinars, and the punishment is doubled, i.e. 4 years if the victim is a child or if the perpetrator is one of the origins or branches of the victim from any class, or if the perpetrator has power over the victim or exploits the influence of a position if the commission of the crime facilitates the state of the victim’s apparent or known vulnerability of the perpetrator.