For a class of 30. Students gain a deep understanding of the vertebrate endoskeleton by dissecting an owl pellet and examining cleared and stained frog, snake, and rat specimens. Through these activities, students study anatomical differences, homologous structures, and examine evolutionary pathways. Kit includes 3 cleared and stained specimens; 15 owl pellets, probes, forceps, and hand lenses; plus a teacher's manual and student guide with reproducible student sheets. The student guide includes background information, specimen guides, labeled illustrations for each specimen, and reflection questions.