All you need is one dice per partner set. Have the students roll the standard form, then have them write the written and expanded form out. Have them check each other and correct the answer if you want. I have the students grade each other on a 1-4 system (1 being they didn't do anything or accomplish anything, 4 being they went above and beyond). They need to give their selves and partner a grade and explain why at the top. You can delete this part if you don't like it. I use it for participation grades for their report card.