Yeah bai. Guyana comes last in CXC exams. Some of those middle teens passing over 20 subjects. When did you or I ever took anywhere near half of those subjects when we were middle teens. I worry about anyone who would buy your doom and gloom drumming. 
You do know that in order to gauge how well an educational system is you don't look at how 20 kids do, many no doubt because of the thousands which their parents lavish on private lessons, but how the AVERAGE kid does.
Guyana AVERAGE CXC performance in English and Math is WAY BEHIND the performance of other nations which take that exam. This isn't gloom and doom this is a FACT. One which the NYC public schools are aware of when they see the deplorable state of many kids just arrived from Guyana. Check with Una Clarke, a former city council person whose forte is education.