National governments use evidence selectively to argue that a successful policy intervention in one local area should be emulated in others ("evidence-based best practice"). However, the value of such evidence is always limited because there is: disagreement on the best way to gather evidence of policy success, uncertainty regarding the…

This Learner Response System (LRS) intervention involves the use of electronic handheld devices that allow teachers and pupils to provide immediate feedback during lessons. For example, pupils can respond to a question using the device and responses are immediately visible to the teacher, or they can work through problems on the device at their…