Typical Costa Rican School, at least the building on the left side of this pic. The other buildings? Wasn't clear if that was part of the school. Most of the schools appeared pretty small and built of pretty much the same design and materials. The kids in the white shirts and navy-colored pants or skirts were students there.
The literacy rate in CR is reportedly something like 96%. Pretty impressive, given that this is still a developing country and not wealthy. And at each of the schools, we saw kids wearing uniforms of the same type and color.
http://www.costarica-nationalparks.com/tortugueronationalpark.html for more info.).