It was a pleasure to have Rob in to observe this lesson, and provide useful tips on how to improve student engagement. Problem: Seth had 15 pieces of lego in his tower, and Shikani had 32 pieces of lego, and Zac had 23 pieces of lego. Who had the most? Who had the least? How do you know? Draw, build or make it to prove it. Goals for the session: * Teach/develop the collaborative inquiry skill of justifying e.g. ‘How do you know?’ ‘Can you prove it?’ * Explore knowledge of number size, specifically, students' ability to identify and order numbers to 100 * Differentiation provided through an enabler and extender. Enabler: Seth had 2 pieces of lego in his tower, and Shikani had 12 pieces of lego, and Zac had 8 pieces of lego. Who had the most? Who had the least? How do you know? Extender: Can you prove it another way? * Children to work in pairs and use varied ways to justify their learning (e.g. materials, by drawing, through an equation etc) My professional goals (areas for ...