The following contains a number of errors. Note up to eight errors, provide an explanation for your choice and correct each one. If you cannot correct the error, then point out to the (imaginary) author that more information is needed. Do not point out more than eight errors – you will lose marks if you do so. In the passed ten years their have been many changes to the education curriculum. Many of these changes have occurred as a result of research; others have simply been top-down changes from politicians. The affect these changes have had upon childrens’ learning is not clear. Research have shown that measuring the impact of educational policies is difficult. Student’s learning is affected by so many different variables that many researchers now believe that multi-level modelling is an essential tool in establishing policy effectiveness. Brown, S. & Blythe, F.. (2008) Can classroom interaction have any effect upon exam results? Education Quarterly, 19(2).