Studying invertebrates is essential for middle and high school science because these animals make up the vast majority of species on Earth and play critical roles in ecosystems, biodiversity, food webs, pollination, decomposition, and environmental balance. Learning about insects, arachnids, mollusks, crustaceans, echinoderms, and other invertebrate groups helps students develop a deeper understanding of classification, adaptation, evolution, ecology, and the interconnected nature of life on our