I’ve been experimenting with the spatial layout of my classroom to foster a more calming environment for the kids. By incorporating softer lighting and sensory materials, I’ve noticed a significant difference in their ability to concentrate. I’d love to hear how others are designing their classrooms to support a peaceful atmosphere.
I’ve added a corner with bean bags and calming music; it really helps; have you tried using essential oils for scent too? 
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It sounds like you’ve made some great changes — i once created a ‘quiet nook’ with soft cushions and a low bookshelf filled with calming books. It was like a mini-vacation for their minds.
I recently tried adding a small water feature, like a tabletop fountain, and it really sets a calming tone — the sound of flowing water has helped the kids focus and settle their minds. Have you thought about incorporating nature sounds?