This pack is designed to give students a thorough understanding of mean, median, mode and range. It includes a fun poem (to the tune of Hey Diddle Diddle) to give students a way of always remembering how to calculate the mean, median, mode or range of any data set, as well as 40 task cards of varying complexity, wall reference posters and reference cards for student’s books.The yellow task cards (1-20) are the easier ones and the orange (21-40), the more complex. The cards can be used in centers