Recommended Reading Order

Alright, this should probably be in the forum section, but meh.

I'm asking this here, because I've cruised the Crystal Hall forums and found lots of contradicting recommendations from fans and don't recall ever really seeing an official response. So, here goes:

What IS the recommended reading order for the Whateley Academy stories?

I could always go strictly by posting date, but that seems inefficient and ends up with having to backtrack a lot as character's stories are started at the beginning of the year chronologically but much later as far as when they were written.

So. Is there an official chronology I can use? Or do I just need to use best judgement?

Melanie E.