There is a real power to allowing students to creatively express their knowledge and there are several very useful tools to help them with that:
http://prezi.com/xr9g6q9wj_x-/how-to-deliver-effective-visuals-in-teaching-and-learning/ - this is a very nice Prezi explaining the principles of visual presentation; very much worth viewing all the way through if you want to learn how to make visuals that truly enhance presentation of information and data
David McCandless turns complex data sets, like worldwide military spending, media buzz, and Facebook status updates, into beautiful, simple diagrams that tease out unseen patterns and connections. Good design, he suggests, is the best way to navigate information glut -- and it may just change the way we see the world.
You can create infographics - visual representations of data - from scratch using free web tools. LIbrary consultant and educator Linda W. Braun takes you step by step through making your own infographic using easel.ly and info.gram.
Source: http://vimeo.com/55186393