"Ok, I am going to regret this, but how do I take the test for you?" Jon asked.
"Ok, well we use the stone right, and we wish for that day that you were me, and that I was you. That way Mr. Mattson will never suspect anything out of the ordinary, and you can take the final for me," Karyn said with a smile, "And to make it all official, we will sign an agreement to our terms before the swap, and make sure that we carefully word the wish with limitations on time and also a trigger word that can undo the swap at any time."
No, That would realy be cheating, I think I have another idea.
How about we make a wish that you could have all my knowledge about algebra?