Barbara Sianesi gives an introduction to propensity score matching, which is a method/device to make two groups look the same.

Rose Wiles gives an introduction to qualitative research ethics. She talks about what is meant by ethics and outlines ethical frameworks for helping the consideration of ethical dilemmas.

Mike Brewer gives an introduction to regression discontinuity approach, which is a way of undertaking causal inference, usually of some policy intervention.

John Scott gives an introduction to social network analysis, which is a general structural and relational method looking at social interaction at micro or macro level.

Andy Hudson-Smith gives an introduction to Web 3.0 and crowdsourcing. He talks about definitions, history and applications of Web 3.0 and crowdsourcing.