This engaging and comprehensive resource with tons of practice problems is a response to the classic math student question "why does this matter in the real world"? This particular lesson is aligned to CCSS 7.NS.A.1 of subtracting a negative. This lesson is taught through the connection of temperature change and calculating vertical distance. An answer key is included!The lesson is structured into 8 parts, outlined below and linked here with more implementation suggestion details.Page 1: Lesson