How to Stop my Sims from Changing When They Go to School

This isn't a bug but it does annoy me. Every time my sims go to school or university, they will change into their Everyday Outfit Slot 1. This happens even if they are already wearing an everyday outfit just a different slot or they are wearing their hot or cold weather outfits. Is there anyway to stop them from changing? It always creates more laundry lol and I spend a lot of time on all their outfits just for them to put on their default one.