Until the 19th century. Century were in Germany, students of different ages together in a classroom. Who learned successfully, advanced in the space to the front of a new performance group – the best students sat in the front of the. Who to sit: remained. The composition of the learning groups has changed so much since then, today, pupils in year learning courses. However, the importance of “repeating a grade” is still similar, Whose performance is not good enough, he’s staying where he is, namely, another year in the old class level. This forced to Repeat a school year is one of the most controversial school-based instruments at all. Again and again, educational researcher, among other things, due to the high costs and false effects. Right?