To investigate the evolution of thinking styles and their relationship with creativity and academic achievement in male and female students of various educational levels with the age range of 12 to 40, the Sternberg, Wagner Thinking Styles Questionnaire and Abedi Creativity Test were administered to 810 people (500 students and 310 undergraduates) and the Torrance Visual Creativity Test (Form B) were administered to 441 of the same students. The research data were analyzed using statistical methods, multivariate analysis of variance and multivariate regression. The research findings showed that: There is a difference between the thinking styles of subjects of different age groups, so that with increasing age (12 to 40), the amount of monarchical, oligarchy, anarchic and conservative thinking styles and to some extent the partial thinking style decreases, and legislative and hierarchical thinking styles increase among some age groups. 2- There is a difference between the thinking styles of students of different educational levels, so that with the increase in education, the monarchical, oligarchy, anarchic, partial and conservative thinking styles decrease significantly. 3- There is a difference between the thinking styles of girls and boys. The amount of legislative, executive, judicial, monarchical, hierarchical, anarchic, general, partial, external and liberal thinking styles is higher in girls than in boys. 4- There is a significant relationship between thinking styles and creativity, so that the liberal thinking style is related to increased creativity and the conservative thinking style is related to decreased creativity. 5- There is a relationship between thinking styles and academic achievement, so that the liberal and hierarchical thinking styles predict high academic achievement in students and the oligarchic thinking style predicts low academic achievement in students.