A Challenge… . Whether you’re teaching 5-year-olds or 12-year-olds, number lines are an incredibly versatile visual model. . A great mathematical block should have routines—whether you call them math talks, warm-ups, or quizzes, we need to rethink what these activities look like. . #themathematicsguy #ltdmathematics #education #learning #school #motivation #students #student #knowledge #teacher #children #kids #teaching #success #community #teachers #inspiration #teachersofinstagram #educationma