The fact is that a handful of the board's posters projects a false image on the country's education...

It is trivial to say that even native speakers make grammar mistakes when writing fast and not editing their text. Here, we have an interesting instance of wrong subject-verb agreement; the head word in the subject phrase a handful of the board's posters is posters in plural form; hence, the subject-verb agreement rule in this case should follow the plural form of the head word in the subject phrase and thus be project instead of projects. Projects as a verbal form seems to refer to a handful of in singular form, but at syntactic level a handful of functions as an attribute to the board's posters and therefore cannot be marked for subject-verb agreement.

No claim is made as to the possibility that EF folks are unaware of it.