Purpose: Private supplementary tutoring - widely known as shadow education because of the ways in which it mimics regular schooling - is increasingly visible across the globe. The Middle East is no exception, though the phenomenon has received relatively little attention in the English-language literature. This article maps some key features of shadow education, identifying ways in which contextual forces have shaped it. Design/Approach/Methods: The article focuses on patterns across and within the six members of the Gulf Cooperation Council (GCC), namely Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, and the United Arab Emirates. It draws on literature in both Arabic and English and shows the value of multiple units of comparison. Findings: Private tutoring has a long history as a significant phenomenon in some GCC countries, but in others developed more recently. Some governments have had active policies to dampen the phenomenon, but with little success. Factors in the complex dynamics include social, economic and cultural forces. Originality/Value: The article assembles literature from around the region, noting both commonalities and diversities among GCC members. It contributes to the global literature by providing the regional mapping from this specific part of the world and by showing comparisons with other world regions.