This is a preparation stage. The so-called prototype is the externalized practice mode of intellectual activities, or the "materialized" operating procedure. Its purpose is to understand the tasks of intellectual activities, get familiar with the objects of activities, and make students ask themselves clearly what to do and how to do it, so as to form the appearance of activities themselves and results in their minds, so as to orient the process and results of activities.

At this stage, the teaching requirements:

(1) Make students understand the complete action structure (components, execution sequence, execution requirements);

(2) Let students understand the necessity of action structure regulation;

(3) Give full play to students' enthusiasm and initiative;

(4) Highly accurate, accurate and clear.

In the teaching process, students can understand the process of personal behavior operation by using the method of physical operation or substitution demonstration, and actively practice it, thus achieving the purpose of understanding the process and being familiar with the action structure.

For example, the number of two piles of trees is different. Before thinking operations are formed in the brain, we count and compare them by hand and mouth reading. This step is prototype positioning.