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Remote Ready Biology Learning Activities has 50 remote-ready activities, which work for either your classroom or remote teaching.
I think, therefore you don't exist when I'm not in the room.
I see your point about other people's perceptions having a sort of cumulative effect, but what about when Eden is by herself? I guess it comes back to the same ol' "If Eden falls in the forest, and no one is there to laugh at her..." question. However, being fairly well aquainted with Eden myself, I'd like to argue that I still exist when you guys aren't around. Or at least, I perceive myself to be existing. In which case, maybe this is an argument about sentience. I'll be honest and say that I feel a bit cocky stating that just because a tree is not aware of itself, it doesn't possess a reality unless a rabbit happens to be underneath it when it falls. Where can you draw a line? If we are all part of the same natural system, why would exceptions about existance be made for some objects as opposed to others? I think the brain is a powerful tool that gives us the ability to understand the concept of perception, but even a mushroom reacts to its environment, it just doesn't "know" that it's doing it. Well, unless there's a lot more to mushrooms than we think, which is always a possibility.