disadvantage of obeying rules Obeying rules will constrain children’s imaginary, so that they cannot solve questions in different ways. Children dare not to practice their own thoughts, because they are afraid of having punishment if they do not obey rules. If students are requested to use one method to write passage, they do not know the result when they describe their ideas in other methods. The problems met in work are complex and people without creativity will have no idea about how to deal with them.