Here is a set of blank top trump cards on pop stars on pop stars along with a rating sheet. Pupils had to complete the rating sheet ranking each star out of 20 on various categories then design questions on the cards which had the same answer as the rating. Swapping card sets with another group at the end to play each others games. I used them for BIDMAS/BODMAS but they could also be used for anything such as percentages, fractions, rounding or basic number.