For example in a science subject it is necesserary that the students understand the way if not they ca n't follow the teacher .
For example , in a science subject it is necessary that the students understand the way , if not they ca n't follow the teacher . For example , in a science subject , it is necessary that the students understand the process , if not , they ca n't follow the teacher . For example , in a science class it is necessary that the students have a basic understanding ; if not , they ca n't follow the teacher . For example , in a scientific subject , it is necessary for the students to understand the way if they ca n't follow the teacher .