As you might expect, there is just one school for all ages. But this school is large, and attracts students from other atolls as well. I had a tour and a talk with an Australian schoolmaster there.
If you dare.... one of their two little planes crashed. And when I was on Air Kiribati, there were 3 more passengers than seats - passengers were sitting in each others' laps !
Atolls are a great place for a bike ride - the southern part of North Tarawa has no cars so biking gets you a lot further to see more. Good news - atolls are flat so it makes riding easy. Bad news - you come to a channel of water to cross about every mile or less. I would not recommend it for South Tarawa though as the drivers are pretty agressive.