Positive Psychology has gained a lot of momentum in the empirical study of personality traits in the field of education. Cognitive and non-cognitive traits may also influence behavior leading to positive or negative outcomes when achieving a goal. The field of positive psychology contains many constructs such as grit and mindset to explain certain personality characteristics and how to make those constructs stronger. While these traits play a significant role in motivation, it remains unclear how these factors affect success in mathematics and science courses which are often perceived to be difficult and challenging courses for many adolescent students. The central purpose of this research is to explore if the measurement tools of mindset and grit have an interrelationship model or if they are independent of each other. 117 students enrolled in a private school between grades 5--12 were asked to answer an online questionnaire which measured their grit level. The literature demonstrates a link between the two variables, which this study verified. A correlation analyses showed a significant positive relationship with mindset and grit, passion and science grades, and fixed mindset with math grades. A regression analysis indicated that growth mindset was the strongest predictor of grit, maintaining the theoretical similarities of the constructs. Fixed mindset was an additional predictor, however to a lesser extent, of grit. It appears both mindset orientations can maintain a gritty disposition. A separate multiple regression analyzed the survey scores that would best predict students' grades in math and science as measured by their first semester grades and found that a student's level of fixed mindset was the strongest predictor of math grades with a significant inverse relationship between perseverance and math grades. To address if there were any differences between middle school and high school students in grit and mindset, a multivariate analysis of variance (MANOVA) was performed which indicated the older the grade level, the greater the students' level of fixed mindset. This study brings focus on developing a school culture to impact students at any age, as it seems that all facets of the school culture must work together including parents, teachers, counselors, principals, and district leaders to allow students more flexibility to pursue their passions as the study reveals that the true nature of grit requires individuals to have a high level of interest in the subject. A spiral curriculum with psychological scaffolding, may be the solution for these traits to develop to make the most of the educational opportunity presented to all learners.