Your students have learned to identify 2d and 3d shapes and now your ready to teach them about which attributes are defining and which are non-defining. My 23 page SmartBoard lesson will help your first or second graders understand the difference between defining and non-defining attributes! The file includes a page of teacher notes, links to 2d and 3d shape videos, interactive pages (guess the shape by attributes, sorting defining and non-defining attributes), a printable worksheet to check f