I do worry when schools display lack of proficiency in the English language. After all, they are establishments whose tasks include imparting formal training in the vernacular.
In particular, they seem to have problems with the use of the apostrophe (posts passim), whether that entails its use as a possessive or as an indication of omission.
The latest example from the nursery slopes of Mount Academia was found almost on my doorstep at St. Nicholas of Tolentine RC Primary School in Pennywell Road, Bristol, which seems to think that childrens is the plural of child.
Should anyone from the school happen to be reading this, the correct punctuation is children’s. In the words of several of my old teachers: you could do better; see me after class. 🙂