For instance, in the last thirty years in Germany, the importance accorded to correct spelling in schools has dramatically decreased. In turn, the acceptance of invented, even if flawed, solutions has increased, regardless of the individual opinions of many teachers. The second traditional way to secure educational quality has been through constant inspection and supervision by a highly qualified state inspectorate in each Land . The main work of the inspectorate in Germany is to control and supervise teachers work in the classroom, participation during school-leaving exams and teachers exams, and the active supervision of our schools daily work. Normally, school inspectors have been successful headmasters or have qualified themselves in inservice teacher training.
Schoolbooks influence the educational quality to a very high degree.
They represent the methodological and didactic level of development and lead to changes which again serve to improve school quality. Because publishers try to fulfill requirements for many federal states, schoolbooks become an important means for standardizing the curriculum. Inservice training for teachers is the fourth and perhaps most important way for assuring quality standards in schools in the midst of constant and dynamic changes in quality requirements. During the last decades, inservice training has changed from the mere imparting of additional knowledge to a reflection of theoretical and effective teaching methods. The training could be even more effective if it were concentrated on single teaching units.