I also don't see it as a red flag at all. It could be any of the reasons mentioned above. I'd also consider that they might want him to attend because the field trip is directly related to seething that is currently being studied in class. Maybe our schools are different than elsewhere, but the vast majority of my kids' field trips are either related to current classroom studies (most field trips), classroom community building (typically only at beginning or end of the school year), or arts appreciation or traveling special exhibit in town. The third things on my list are the only trips is really consider optional - and I would still send my kids because I think they are worthwhile and they (here) are usually free or much lower cost than to the general public.

Have you asked the school yet why it's mandatory?

polarbear