When it's time to go back to school, parents and students make back-to-school preparations. The phrase takes hyphens as a compound modifier but not as a noun.

by apstylebook · 7 years ago · via Instagram

Recess fun! #saintbrendanschool #onlyatsaintbrendan

by saintbrendanschool · 8 years ago · via Instagram

Craft time in 2nd grade! #saintbrendanschool #onlyatsaintbrendan

by saintbrendanschool · 8 years ago · via Instagram

regram @maxim_photo A relaxing evening in the Vosges , France . . . . . . . . . . . . . . . . . . . . #france #francetourisme #visit #visitfrance #atoutfrance #vosges #hautesvosges #gerardmer #lac #lake #lago #sun #sunny #winter #snow #cold #colorful #me

by gerardmertourisme · 8 years ago · via Instagram