This zip file contains a lesson on APPLYING COUPONS to PURCHASES; the download contains a 3 slide promethan lesson. This promethean lesson is part of the BUYING FOOD unit.The math involved is basic and was geared toward a special education class. However this lesson would be still useful to elementary or middle school level general education classes. . Along with the lesson material, this lesson includes a slide containing a pre-class question geared toward the lesson to check for prior knowl