A serendipitous Pythagorean #LessonStarter

#LessonStarter is a Twitter hashtag, used particularly by Matt Skoss, to collect together ideas that might start (or take over!) a lesson. A #LessonStarter is usually a provocative image, but could also be an intriguing mathematical prompt. For me, lesson starters are often spontaneous. Today, a few serendipitous moments meant that I had a lesson... Continue Reading →


This is a quick post mainly for the benefit of my 'Developing Mathematical Thinking' (#math1070) students. Introducing the puzzle Skyscrapers are one of my favourite logic puzzles. They are a Japanese creation, introduced at the first World Puzzle Championship1 in 1992. Skyscrapers are a type of Latin Square puzzle. A Latin Square in an n × n... Continue Reading →

Redux: #NoticeWonder and #PrimeClimb

Last year I wrote a post about using the two simple questions 'What do you notice?' and 'What do you wonder?' with my maths pre-service teachers to dig into the mathematically-rich image that accompanies Dan Finkel's game, Prime Climb. This year, I wanted to turn this into a student-driven rather than teacher-led activity. I also... Continue Reading →

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