I use this activity to review area under the curve and using sigma notation to represent Riemann Sums with left, right, and midpoint rectangles. This activity is best for partners as it encourages team work, reinforces use of vocabulary, and facilitates discussions to further understanding of this essential topic in Calculus and PreCalculus. This is a fun change of pace from just your regular review worksheet day! The file includes the printout for the individual cards, answer sheets for stud