Middle school students, 12-14 years old, diverse skin tones, casual wear, backpacks, curious expressions, exploring sustainable architecture models, green roofs, solar panels, rainwater harvesting systems, recycled materials, natural light, ventilation systems, earthy color palette, modern minimalism, open classrooms, collaborative learning spaces, urban background, cityscape, blue skies, fluffy white clouds, soft sunlight, shallow depth of field, educational atmosphere, inspiring ambiance.