The lessons consist of One or more challenging task(s) One or more consolidating task(s) (see Dooley, 2012) preliminary experiences that are pre-requisite but which do not detract from the challenge of the tasks supplementary tasks that offer the potential for differentiating the experience through the use of – enabling prompts (see Sullivan, et al., 2009) which can reduce the number of steps, simplify the complexity of the numbers, and vary the forms of representation for those students who cannot proceed with the task; – extending prompts for students who complete the original task quickly which often prompt abstraction and generalisation of the solutions.
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