š¾ Montessori Zoology Material ā 5 Classes of Vertebrates Puzzle Observation & Assessment Checklist Form Understanding animal classification through hands-on discovery. The Montessori Observation and Assessment Checklist for the 5 Classes of Vertebrates Puzzle Material is a thoughtfully designed tool to help educators observe, document, and assess a childās understanding of animal classification, vertebrate groups, and zoological vocabulary through concrete, engaging work. This checklist support