3 Free (But Powerful) Presentation Tools For Teachers. Teachers are presenters. Let’s be frank. They get up in front of a room of people and present. Glogster - join the visual communication network. Graphical Bios. Stunning. Simple. Thoughts on Presentation Software. Hype. Thoughts on Hype. Slideshare. Prezi - The Zooming Presentation Editor. Thoughts on Prezi.