„In Cyprus, 86 percent of students in secondary schools received additional education from private tutoring: 70 percent in Hong Kong, 88 percent in Kenya, 83 percent of students in primary schools in Republic of Korea, around 70 percent of pupils in secondary schools in Japan, and 91 percent in Mauritius.“
Univ.-Prof. Dr. Ji Yun Lee, „Private Tutoring and its Impact on Students‘ Academic Achievement, Formal Schooling, and Educational Inequality in Korea“ (2013), S. 1f