Appreciation of any aspect of Judism, being frum is something that has to be incorporated way before high school days.
We have grandchildren who attend a certain Chassidishe yeshiva and every Erev Shabbos all the students meet in a special room called Oneg Shabbos where they learn a new song/zemiros, hear a nice story to share at the Shabbos table and get dvar Torah to share at home. In addition there are other handouts they receive which will keep them occupied over Shabbos,which include questions and stories to read and share.
For the ladies annual party, the boys all did some crafts as a Challah dekel, challah board or other crafts which was presented to each mother. The children look foward and are excited for Shabbos. It is a pleasure to spend Shabbos with them and the Seuda can stretch for as long as we want without devorim betailim,nonsense. Throwing halachos and not do lists is not the way to present Shabbos. Unfortunately, improvement is needed is the area of Shabbos appreciation. Recently, when sitting on the porch close to Motzei Shabbos i overheard children calling who was first for the computer once Shabbos was out. ……and we can’t blame schools as chinuch begins at home. Schools and yeshivos are for content subjects!!!