If you would like an exemplar ToK style lesson power point click here. How you can deliver it is to focus on the idea that in science the best current model or theory tends to be derived from a mixture of two previously competing theories in this case our current understanding of the particulate nature of matter is that all substances are in like both waves and particles. It is also good because depending on the detail you go into the science it can be used for any age group. The emphasis isn't on the science and the "facts" but on the scientific method and how science progresses.