If you can use 'clickers' aka "classroom response systems", then you can make the lecture lively by having it focused around questions, which importantly provide you with proper data on misconceptions in the students' minds. If the correction of such errors is key, making them visible will allow to you attack the most salient points: those errors widely shared. As a bonus, it provides the student with something to do, increasing their attention. It's great that you are also giving the material in advance.