The following is a three-part lesson (Minds On, Action, Consolidation) dealing with estimating and calculating differences. This lesson is ready made for either a whiteboard, entire-class approach or individual distance learning approach. It comes complete with example questions and worked responses as well as 10 consolidation questions that students can complete after the lesson has been finished, so they can work toward mastery of this topic. As an added bonus, the 10 consolidation questions a