The fourth classification first graders are learning about is reptiles.  Reptiles, usually have a backbone, have scaly skin, are cold-blooded, hatch from eggs, have lungs, and breathe air.  Using a Venn diagram, students were tasked with finding similarities and differences among reptiles and amphibians.  In reading, first graders have self selected various books about reptiles.  They also researched at least one reptile to be included in their individual field guide.  Tying measurement to our study of reptiles, each student selected one kind of snake to draw and measure.