I'm especially interested in multi-step questions - or puzzles - that encourage students to select a series of techniques to arrive at a solution. The hope is that students will develop the resilience needed to answer, for example, harder geometry questions. My particular focus is Circle Theorems, which I also use for one of my SSDD resources as the 'surface' with the 'different deep' being other shape topics such as Pythagoras, Trigonometry, and arc length & segment of a circle.