https://www.youtube.com/watch?v=eFVscXFwbXMout

https://docs.google.com/document/d/1CiAOpWC__jdSmKEmO57RkkQvS9EpgGDSFPo402yqkco/edit?usp=sharing

https://docs.google.com/document/d/1bok-htSne2QMe_z_y6aiWkcBHPBxmymvwU3XtMQe_fQ/edit?usp=sharing

http://prezi.com/mdgq_3wdkgaz/?utm_campaign=share&utm_medium=copy&rc=ex0share

http://prezi.com/ryo9wgdm7ltk/?utm_campaign=share&utm_medium=copy&rc=ex0share