SA is as far south as you can get on this planet. 

But we're talking about age aren't we? The geology of the Big Island comes directly from core of the Earth is from a plume from the mantle that has formed the Islands. It's very new rock. 

But what that means is it's also very old in the lifetime of the planet. Pangea is really the youngest rock formation. Our rock has only evolved in the last 65 million years.

The ranking of students hardly changes after October. If you wait till the end of the classes then you're really just deciding where the grades go in the ranking. It would be far better to give them warning in October that they're not doing well and they should be working harder or asking for help. October is about as final as is the final.