I have two Shape Cut rulers (one in quarter inch, one in half inch increments), and I use them both! I make lots of strips for log cabins, etc., and 1 1/2" squares for postage stamp quilts, and this ruler really helps ensure accuracy, not to mention shortening up the time it takes. JoAnn's has them...buy it with a coupon and you can get it for half price. What will you be making? Have fun at your class!