That Plain English email also went into a hissy fit about:

Students who walked out of Headlands school in Swindon (Report, May 18) were advised by the council's head of education to "re-engage with their learning environment". It might have been more effective to tell them to go back to school.

As is often the case with the much maligned modern usage, it expresses the meaning better than the preferred oldpseak. You can go back to school from now till the middle of the next century; if you don't re-engage with the learning environment it isn't going to do you a bit of good.