Edited sentence: (2006) are citing studies that screen out those with prior experience to concentrate on those that are truly novices.According to Mayer this cycle has happened time and time again.First it was Bruner (1961), next came Piaget (1970), then Papert (1980) and now it's the constructivists.In addition, Mayer (2004) did an extensive literature review dating back 50 years and found that many "movements" professing some new method of teaching learners with active learning strategies, have come and gone.In each case, empirical research has come along to provide evidence against those professing the wonders of this new methodology, only to have them fall out of favor, to be later replaced by some other group professing some other new method.Not the other way around.When will we ever learn.... teach them first, and let them practice.Whereas Kirschner et al.While an individual study here or there, may support active learning, these studies usually always involve learners who had some pre-existing level of expertise, thus the result is only measuring the effects of practice in those with prior knowledge