The fastest-growing education sectors globally are characterized by increasing investments, expanding student populations, and significant reforms aimed at improving quality and accessibility. Here are some of the fastest-growing education sectors: 

1. China: With substantial government investment and a focus on internationalization, China’s education sector is rapidly expanding. The country is seeing growth in both domestic higher education institutions and the influx of international students. 

2. India: India’s education sector is growing quickly due to a burgeoning young population, increased government spending, and a rising middle class prioritizing education. There is also a significant push towards digital education and online learning platforms. 

3. Vietnam: Vietnam is experiencing rapid growth in its education sector, driven by economic growth, increased private investment, and a strong emphasis on STEM education. 

4. Indonesia: Indonesia's education sector is expanding due to government initiatives aimed at increasing education access and quality. There is also a growing demand for higher education and vocational training. 

5. Brazil: Brazil’s education sector is growing, particularly in higher education and vocational training. Government policies and private sector involvement are helping to drive this growth. 

6. Nigeria: With a large and growing youth population, Nigeria's education sector is expanding. Efforts to improve educational infrastructure and access are driving this growth, alongside a rise in private educational institutions. 

7. Saudi Arabia: Significant investments under Vision 2030 are transforming Saudi Arabia’s education sector, focusing on diversifying the economy and improving educational outcomes. 

8. Kenya: Kenya’s education sector is growing, fueled by government reforms, increased funding, and a focus on technology and innovation in education. 

9. United Arab Emirates (UAE): The UAE is rapidly expanding its education sector, with significant investments in higher education, international partnerships, and an emphasis on becoming an educational hub in the region. 

10. Bangladesh: Bangladesh is seeing growth in its education sector due to increased government spending, efforts to improve educational quality, and a focus on digital education initiatives. These countries are experiencing significant developments in their education sectors, driven by demographic trends, economic growth, government policies, and a growing emphasis on quality and accessibility in education.