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.2 & 7.EE.A.1 of analyzing misconceptions around equivalent numerical expressions and equivalent variable expressions. This lesson is taught through the connection of analyzing misconceptions at a high level. An answer key is included!The lesson is structured into 8 parts, outlined