It just seems to me that what is being called "Islamic education system" is likely not a monolithic institution. Is the system coordinated across countries and

It just seems to me that what is being called "Islamic education system" is likely not a monolithic institution. Is the system coordinated across countries and sects? What is the commonality between them? Is there a more specific definition of what constitutes such an education system or are there more specific details about where this system exists and who the (specific) people are who are being educated by it?