Timing: 15 minutes to run, 30 minutes to prepare (once only). Materials: 32 Index Cards of one colour (I choose blue). 7 Index Cards of another colour (I choose pink). A permanent marker pen (i.e. sharpie). Two flip chart pieces of paper (A0 size) or large pieces of butcher’s paper. A very large desk or two desks large enough to hold the two pieces of…