not even review the data in class due to problems with skeptics shouting down the discussion. I get a few complaints from skeptics so I developed an alternative assignment on energy sources. No-one has ever done the alternative assignment. Last year I assigned the Skeptical Science handbook and got a lot of flak from the students as they thought it was political. We had a very popular physics teacher who claimed his textbook proved that the greenhouse effect could not exist. Many students believed him. Students also will believe a popular history teacher over a science teacher if they like the message. People respond far better to visual demonstrations of a scientific principle, something they can see, rather than to mere words and clever arguments. Tyndall carried out such a crude (but striking) experiment in 1859 to show the heat-trapping properties of CO2 and CH4. Prof. Iain Stewart demonstrated a modern version -- more accurate and very convincing -- in his BBC documentary "The Climate Wars", by passing the IR rays from a candle through a one-metre tube of CO2 to an IR-sensitive camera. I suggest you view the doco. Then, consider staging a pilot trial with such equipment at a few schools; even outright deniers have difficulty explaining it all away. After that, they might be more inclined to listen to rational argument. In response to the OP: Great initiative and best wishes with it. But as a long-time teacher in I would encourage you to develop something for