Compared with higher education, the shortcomings of lower education;

(1) the knowledge points of each knowledge system are in disorder, and a complete knowledge network cannot be formed.

② Because most of the lower education knowledge is to solve the problem of ideal simplification, it is difficult to apply it to practical problems.

(3) Because the learning depth of lower education is shallow, it is easy to produce root problems, which leads to certain fuzziness in learning.