This is an infinitely extendable speaking activity which has come in handy over the years, particularly with those last minute cover lessons!
It’s one of those that works better at higher levels, but I think could work anywhere from Intermediate upwards, as it relies on learner ideas rather than language per se. There are opportunities for language input built in, and these could be developed further if necessary.
Essentially it’s an opposition debate, where learners debate the things they believe in – or not as the case may be!
Downloadable pdf version of the plan is attached here: teflgeek – Reason to believe
Any and all feedback / suggestions for improvement appreciated!