(1) In low-structure teaching, children and teachers jointly set learning goals, while in high-structure teaching, learning goals are mainly set by teachers;

(2) Low-structure teaching is mainly initiated by children, while high-structure teaching is mainly initiated by teachers;

(3) The motivation of low-structure teaching activities is mainly children's needs, while the motivation of high-structure teaching activities is mainly teachers' rewards and punishments;

(4) Low-structure teaching emphasizes the process of activities, while high-structure teaching emphasizes the results of activities.

2. Single concept teaching or comprehensive concept teaching with discipline (field) teaching as the main form is located on the right side of the continuum, which embodies the highly structured educational activity characteristics of teachers initiating teaching activities, teachers determining teaching content and completing teachers' predetermined teaching objectives. Project teaching in the form of thematic network is located on the left side of the continuum, which embodies the characteristics of low-structured educational activities, such as children or teachers initiating exploration activities, children or teachers carrying out learning activities in the process of interaction and paying attention to the process of activities.