Gardner first outlined his theory in his 1983 book Frames of Mind: The Theory of Multiple Intelligences, where he suggested that all people have different kinds of "intelligences." Gardner proposed that there are eight intelligences, and has suggested the possible addition of a ninth known as "existentialist intelligence

Studies show that many students who perform poorly on traditional tests are turned on to learning when classroom experiences incorporate artistic, athletic, and musical activities.

According to Gardner, there are eight kinds of intelligences. Howard Gardner's theory of multiple intelligences requires teachers to adjust their instructional strategies in order to meet students' individual needs.

The Theory of Multiple Intelligences encourages instructors to break from the traditional methods of presenting materials in a manner suited to only logical-mathematical and linguistic learners and to instead present materials using methods that will reach all learners.

MI can help students and teachers develop a deeper understanding of their abilities. It demonstrates to students how they can use their strengths and address their weaknesses. It boosts self-esteem and encourages risk-taking. It motivates students to learn more and to learn deeply.