 Kumon Instructors are considered experts in the Kumon curriculum, observing students’ study habits and individualizing the programs to suit a student's ability.Kumon Assistants are trained by Kumon Instructors.As a high school mathematics teacher, Mr. Kumon understood that an understanding of calculus was essential for Japanese university entrance exams so in writing worksheets for his son, Mr. Kumon focused on all the topics needed for a strong understanding of calculus starting from the basics of counting.