"Education at a Glance 2021 OECD Indicators" primarily focuses on providing a comprehensive analysis of various aspects of education systems worldwide, including equity, gender, socio-economic status, and regional disparities. It aims to offer valuable insights for policymakers, educators, and researchers to improve educational equity and effectiveness globally.

"Education at a Glance 2021 OECD Indicators" addresses socio-economic disparities by providing detailed data and analysis on how socio-economic background affects students' progress through the education system and their subsequent success in the labor market. It highlights the need for policies that address these disparities to ensure equitable access to quality education for all individuals.

"Education at a Glance 2021 OECD Indicators" explores gender disparities by examining how gender influences educational choices, performance, and career paths. It emphasizes the importance of targeted interventions to promote gender equality in education and support both boys and girls in achieving their full potential.