Successful Education System in Cuba

There are many books on the education syatem in Finland, but I've not seen any books on the education system in Cuba. I thought the education system in Cuba would be as sama as the N.Korea because these countries are the socialism and there are strong commander. The education system would have been brainwash. However, the system in Cuba seems very opened. Everybody can get a chance to go to higher levels. Of course, all schools are free.
The education systems in the advanced countries seem collapsed. Rich people in the advanced countries don't want their kids to go to public schools because they thought the public schools would have many issues. I aggree their opinions partially because I think there are some great teachers in Japan. However, there are very rare chances that my kids meet the great teachers in the public schools because good students in college did not want to be teachers. Teachers don't have any good salaries, and they have to be extened duties for their students. If a student have a large trouble out of school, his/her teacher is sometimes complained by his/her parents or their local society, or sometimes mass media. It's terrible.
In the past, many high educated women became teachers because there were not good works for women in Japan, but the law of Equal Opportunity Employment was imposed, and there has been many chances to get better jobs for women. many high educated women don't want to become a teachers....