In the first Chapter, Guenter Faber examines the way in which academic self-perceptions significantly affect the educational performance of learners. Faber presents a study on the relations of students’ self-perceptions with their subjective explanations of grammar success and failure. In the second chapter, Maria Fernanda Molina, Ph D, Vanina Schmidt, Ph D, and Maria Julia Raimundi, Ph D explore the relationship between adolescents’ possible selves and the parental elevation of challenges. In the third chapter, Miguel Angel Broc, Ph D studies the Susan Harter model of academic motivation in the classroom. R. Constance Wiener, Ph D and Alcinda Trickett Shockey discuss oral health self-perception in the fourth chapter. In the fifth chapter, Lindsay S. Meldrum, Diane E. Mack, Ph D, and Philip M. Wilson, Ph D study whether alteration in psychological needs fulfilment facilitates the correlation between moderate-to-vigorous physical activity and physical self-concept. In the sixth chapter, Merilyn Meristo, Ph D present a study on university students’ motivation as it pertains to completing homework assignments.