This STAIR project demonstrates a great job in introducing the shapes and its different kinds. The presentation clearly introduced, explained and practiced the concept very well. It was very well organized and appropriate for lower elementary grades. Fonts, slide layout, images, animation, and transitions were easy to view and read. The videos were not working. On the video slides, there were text included and the video but there was no audio. It might be a good idea to include audio for those as well since the presentation is for young students. It would also be a good idea to have audio on the first and last slide. In addition, it would be useful to explain how to go from one slide to another or what to do when you got a correct or incorrect answer. Adding audio might help in explaining the process at the beginning of each section. It would be helpful to have some sort of explanation when getting the wrong answer. Overall, it is a great presentation and I am sure that your students will enjoy working through it.