Okay kiddo, so you know how at school, you have different classes like math, science, and history, right? Well, in Europe, they have different subjects too, but they also have different ways of organizing their schools and education system.
Sometimes, people in Europe might realize that the way they are organizing their schools is not working very well. So they might want to change things and try new ways of teaching and learning.
When they want to change things, they will "tune" the educational structures. Tuning means adjusting something so that it works better – like tuning a guitar to make it sound just right.
When they tune educational structures, they might do things like changing the way classes are scheduled or creating new classes that focus on specific skills. They might also think about how to make sure all students have equal opportunities to learn and succeed.
It's a bit like rearranging your toys in your toy box – sometimes you need to move things around to find the best way to play. And in Europe, they are trying to find the best way for everyone to learn and have fun at school!