Why are these students grinning so hard?

These are last year's Rheto class. And they have just gotten the news that HAFF had received money for a scholarship fund for them to go on to Philo. Let me explain what that means.
When I first came to Haiti, the National school system was broken down into grades in the following way. Primary school started for a few children at age 3 with Kindergarten or Preschool. It then continued for 8 more years with grades called Infants 1 and 2, Preparatory 1 and 2, Elementary 1 and 2 and finally Middle 1 and 2. After the Middle 2 year, all primary school children must take an official National exam for a certificate that determines if they may go on to secondary school. For the last 2 years HAFF has hosted this exam for the primary schools in the area.
If a student passes the National certificate exam, he or she may go on to secondary school. And for HAFF, that means they come and take our entrance exam. Sixty of those who pass both the certificate exam and our entrance exam may come to BTI. We choose the students on a first come, first served basis as long as they have passed both exams. Up to this point, this is still the system in place today.
Now it gets a bit tricky! When I first came, Secondary school started with grade 6 then went to grade 5, 4, 3, 2 and then 1, which was also called Rhetorique, or just Rheto. After Rheto, there was another National exam, called the Baccalaureate 1 exam. If the student passed the Bacc 1 exam, he or she could go on to the final year of secondary school, Philosophe, also called Philo. At the end of the Philo year, another exam is taken, the Bacc 2. When a student has both the Bacc 1 and the Bacc 2 diplomas, they are done with secondary school and may go on to university or trade school.
Now, though the results are the same, for the most part, and most people call everything the same things, officially, things are a bit different. Grades 6, 5 and 4 of secondary school are now called the Fundamental Years 7, 8 and 9 respectively! After the 9th Fundamental Year (the former 4th grade) students now take yet another official National exam. If they pass this exam, they may go on to, not the 10th year, but, the old designation, 3rd grade!!! And the rest finishes as stated above.
So, the students pictured above have passed all the tests and finished all but their Philo year at their local primary schools and then at BTI. But BTI does not offer Philo. So, these young people were obliged to seek a new school for their last year. For most, this represented a real financial hardship. HAFF charges a laughably low tuition compared to all the other schools in the area, though the actual cost of their education is much higher. HAFF was blessed to have a donor offer money to be used for scholarships for former BTI students who want to continue their education. There was enough to offer all these students 3/4 of their year's tuition at their new school! Thanks be to God!!!