One element of variation is about drawing attention to something by paying close attention to what you vary and what stays the same.  

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Standard, non standard and non concept examples

When modelling a new concept I show standard and non-standard examples alongside misconceptions. 


Research shows that this helps to the learner to discern the concept against the non-concept.  It also allows the learner to discern the concept in novel situations

Spot the variation in these clips

Variation Theory

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