Vertebrates and Invertebrates sorting cards and activities

Vertebrates and Invertebrates:

Picture 2: sorting cards I found at http://homemademontessori.blogspot.com/search/label/vertebrates

Picture 4: animal sorting (mammals, birds, reptiles)-- http://filefolderfun.com/KindergartenScience.html

Picture 4: animal classification cards (amphibians, arachnids, birds, crustaceans and more): http://www.montessorimaterials.org/science.htm