I need some advice! I am teaching a demo lesson in a K class next Friday, and I am stumped. The objective I am supposed to teach is comparing the number of vertices, faces, and edges of 3D solid figures. I just am stumped on how to plan an engaging lesson for K kids for this. Here are some ideas I had (the class is mostly ELL students): introduce vocabulary with pictures - attribute, faces (explain how this is different than a face on a person), edges, vertex/vertices; Review solid figure names and have a poster as a frame of reference. Model pulling a solid figure out of the "mystery bag", identify it, and use sentence frames to describe it. "A _______ has ____ vertices." Have a few students take a turn. MAYBE (just brainstorming still), give each child a shape. Have them count the number of vertices, then turn and talk with a partner and compare the numbers. I would again give them sentence frames to practice using: "A _______ has more vertices than a ______. Have a few partners share with the class. Maybe repeat for another attribute? For the independent practice portion, maybe I will make a little half-sheet paper for the students to fill out, describing their shape somehow. Haven't figured out the details yet. For a closing activity, my idea was to have a shape in a paper bag. The students would close their eyes and feel the shape, then try to guess which shape it is, based on the attributes? Any and all constructive criticism is appreciated!! I actually taught K for 3 years but this objective has me nervous, or maybe I'm over thinking it. Please be brutally honest if there is anything I should change. Thanks sooo much!