Finally, a post not about cooking …
I recently gave a 1.5hours lecture to friends who were interested in Bayesian statistics, and the slides are here.
This lecture covers (very briefly) the following topics

Bayes formula (i.e., conditional probablity)
 Example: breast cancer screening

Bayesian parameter estimation (i.e., posterior distribution formula)
 BetaBinomial updating, with a coin flipping example
 Example: Bayesian inference on the Rotten Tomato “freshness” of the Harry Potter movie series (This is what the above picture is about)
 MCMC (very highlevel intro)

Bayesian hypothesis testing