The use of self-assessment is important in establishing a positive assessment climate. Self-assessment, intelligence and individual characteristics are either provided by the teacher or developed by the teacher in collaboration with students. This book will present the theoretical views of famous authors about the determinants of the activity of the teachers and the students, about the Multiple Intelligence. The book describes further more researches about the relationships between teachers and students, self-assessment of individual characteristics and team roles of students and self-assessment of the individual characteristics of the teacher.