What do teachers of an autonomous region think about their training after an educational change?

This work is centred on how the teachers′ thought has evolved. It is focused on experimental science teachers in the Canary Island Autonomous Region (Spain). It is also about the professional development during a time lapse that coincides with different educative laws. In this work, there are two stages. At the first stage, it is designed and elaborated a poll on the teachers′ formation and training, based in an opinion poll in 2002 and 2011. The results are studied and they give us some conclusions which clearly remark what aspect of the teachers′ opinions have changed and which ones still haven′t changed. Then, at a second stage it is compared the results with similar questions that were investigated by some authors in 1988 and 1989 so we can now compare the teachers′ opinion, in different moments, on the most important aspects related to their formation and training.