My translation of the story as it appeared in the online version of the French paper Le Dauphine:
Assault in Gironde: hit by student's mother
Originally, [the teacher] wanted to explain to the mother that her child had insulted her. As things turned out, this female teacher from Georges-Leygues, in Pessac (Gironde) was assaulted by the mom.
The incident took place Tuesday after the end of classes. The teacher had first invited the student's parent to enter [the school], but the mother stopped in the courtyard. "She started to insult her, then physically attacked her" with her fists, according to the principal. The result: a broken rib. In a state of shock, she was held for observation until Wednesday, the beginning of the holidays. The Republic's prosecutor explained yesterday that "the suspect admitted her involvement but gave a different version than that of the accuser."
The instructor, in her forties, pressed charges. The principal added that she herself had already brought compaints [against the parent] for violence, threats and insults from encounters with the mother a year ago.