Number of tutoring businesses in major cities grew between 200 % and 500 % during the 1990s …

Kanada: „The number of tutoring businesses in major cities grew between 200 % and 500 % during the 1990s.“

Univ.-Prof. Dr. Mark Bray, „Shadow Education: Comparative Perspectives on the Expansion and Implications of Private Supplementary Tutoring“ in „Procedia – Social and Behavioral Sciences“ 77 (2013) S. 414