Although there has been a lot of discussion about big data and learning analytics recently, Pasi Sahlberg has turned his focus to small data, “those tiny little clues that can reveal big trends or ideas”. He says that school is much more about the tiny little things that only educators can see and then use their professional wisdom and raw instinct to take those clues and use them for solving problems or making making sense out of the things that work or don’t work in a school. Pasi believes that when we talk about evidence based education, and evidence based policies or teaching, that much of that evidence is actually teachers’ own professional wisdom and experience and comes from professional judgement in interpreting small data.