Question about separate school activites

My sister and I live close to each other in a small rural community and our kids go to the same small school (80 kids in the whole school). Because our school is small, they do split grade primary/gr1, gr1/gr2, gr3/gr4, gr4/gr5. Both our sons are in grade 1 but different classes. Her kid is in the p/1 and mine is in 1/2. My kid's class is going swimming at the local pool. This was organized by his teacher. My sister is having a fit. She thinks her kid is missing out because her son's class is not going. She thinks because they are in the same grade they should both be attending. She thinks this trip is unfair and her kid is being left out. She's meeting with the principal today about it. I feel like she's over reacting. I'm not just thinking she's over reacting because my kid is going and hers isnt. In December her kid's class had a trip skating that my kids class didn't attend. There have been a few trips since the first of the year that one class did but not the other. There have been several trips half or all of The school went. The school doesn't really focus on grade levels when It does these activities. It's all class based. But because her kid likes swimming, she has deemed this particular trip, unfair and she thinks he's going to be upset and jealous. I am completely cool with the school's arrangement for trips. To my knowledge, when a trip is planned, all classes are offered to go, but teachers may decline based on their teaching schedule and whatnot. When my kid asked why one class goes and another doesn't (which has only been once, the year he started school) I told him it's because that teacher organized it for their class. It was a non issue. There is only 4 classes (5 grade levels in the whole school). My sister is making a HUGE deal out of this and I was just curious if I was missing the big picture or something. What do you all Think? via /r/Parenting http://ift.tt/2F86OoG