After 30 years of war, Germany is in a state of poverty and backwardness. Due to economic difficulties, parents are not active, many contents of school rules have not been seriously implemented, school funds are short, and infrastructure is poor. What is particularly striking is that teachers generally have no formal training. Many rural teachers are priests or industrialists, most of them are tailors and shoemakers, and some are disabled soldiers. These people are poor in knowledge and can only teach simple reading and writing, and at most some simple arithmetic. Teaching methods are torture and rote memorization. The teaching contents in primary schools are mostly reading, writing, religious education and singing. Gradually increase some knowledge of arithmetic, natural science and history.