Students who have worked on sequences and series (e.g. geometric progressions, arithmetic progressions, infinite sums, etc.) have found this quick reference useful. The formulas are laid out neatly, and once the cover page is removed, the entire document can be printed double-sided on a single sheet of paper. This helps students not confuse arithmetic and geometric sequences and series (one side, one type of progression). What's more, compound interest is included. All the variables are clearly labeled so that students can get right to working problems instead of flipping around a textbook or looking things up on the Internet over and over again.