These are issues in education confronted not only in Fiji but all around the world.
A research paper in 2010 by a number of Universities (Stanford etc.) in the USA looked examined the evidence related to:
teacher's experience - "more is not always necessarily better",
school socio economic demography
The paper asks:
"Do students attain higher levels of achievement when taught by more experienced teachers? What is the relationship between teacher experience and teacher productivity? "
The researchers used their evidence and made some suggestions for policymakers when it comes to teacher experience in a range of settings.