If Learning Styles exist then the teachers should teach in the style that a student  prefers to learn. But, Willingham (Willingham, 2009) has shown that if the subject is visual then the teachers should teach in a visual style and not an aural style. For example, if the subject is geography and we are teaching the shapes of the countries in Africa then we should teach in a visual style, even if we know that the student is an aural learner. One should teach in the manner that the topic demands. Another way to put it is, the way one learns is topic dependent as Curwin thinks (Curwin, 1999).