This Common Core geometry lesson covers identifying two-dimensional shapes by their attributes. The lesson includes research-based strategies and strategic questions that prepare students for Common Core assessments. In this lesson, students will describe the attributes of a shape that are always true and sometimes true, and then match various shapes to the correct bin. Shapes identified are triangles, rectangles, squares, circles, pentagons, and hexagons. In addition to the lesson, there are four pages of Independent Practice with questions modeled after the Common Core assessment items.