Ключевые слова: acorn cluster, acorn development, acorn growth, acorn season, autumn season, back to school, botanical study, educational nature, educational theme, fall colors, fall season, forest scene, green acorns, leafy branches, natural beauty, natural landscape, nature classroom, nature observation, nature scene, nature study, oak foliage, oak fruit, oak leaves, oak nuts, oak tree, school preparation, school readiness, school season, school year start, seasonal beauty, seasonal change, tree branches, tree canopy, tree fruit, tree growth, tree study, woodland beauty, woodland landscape,