Use this sheet to print copies (color paper, cardstock) to put on every student’s desk to refer to when solving and using arithmetic and geometric series formulas. Consider using sheet protectors to keep them in to preserve more and prevent the page from ripping or getting destroyed too quickly. Instead of making your own, use this sheet. It’s in Word format so you can add or edit as you wish. You can also print a poster-sized paper to put up on a wall.