What I see in this.
Outside, doing, nature, belonging, intersections, a whole of many parts.
Rocks, three kinds,granite, basalt and a metamorphic rock. Solid, some born in long, slow, processes, crystallizing deep underground. Some cooled quickly, near the surface. Some changed by squeezing, folding, pressure. All weathered and different from where they originated.
Leaves and seeds. Green, oxygen, ephemeral, new, life.
Water. Peace, calm, escape, renewal, essential. Essence.
Concrete. School, thinking, learning, solid, foundation, should be accessible to all, should facilitate learning and success.