When subject-matter is highly technical or requires that I have to deal with formulas, rules and the like, before starting into the subject matter, I try to find a common ground from everyday life that all can relate to and start an informal discussion with the class asking them what order do they follow when putting that engine back together, or how they reach that “higher” level of the game that they play, to try to show them that if they apply that same frame of thought or strategy towards what we are about to study, it can be challenging, but not impossible to understand and master what we are about to learn!