As we all move to Common Core, we must get our kiddos ready to justify their thoughts. The PROVE IT chart can be used for just about anything. It is provided for you as a Word Document so you can modify as needed.
I simply give my students an assessment or practice questions along with the PROVE IT chart and instead of giving them the easy way out with giving me their answer and moving on, they must justify why in order to get the answer correct.
This can be used as an independent activity or partner activity.