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The pass rate in Miami schools is low, but I think that schools in Miami are far better than what I have seen about public schools in Barahona. For one thing, the school rund in two four hour shifts, and that mean about 3? hours of actual instruction. A friend's daughter wants to be a nurse an has done well in school for the first 7 grades, but the Intermediate (I guess that is what it is) school was supposed to also run in three shifts per day, meaning that the school would start at 6:00 and end at 10:00 PM. But then they could not get teachers to teach during those hours.
Obviously some students can attend class during more reasonable hours, but no one seems to know how to get enrolled in the morning or afternoon classes.
Costa Rica has among the best schools in Latin America. CR is a mostly middle class country and I think Ticos are more into learning. Uruguay, Chile and Argentina, Panama and Ecuador also do pretty well, but probably none of them as well as Spain. Argentina and Cuba are slipping, partly because of teachers being so poorly paid.
I am no expert and base this on what I have read in the newspapers of these countries.