They had gone through a rigorous testing period last year when he was in grade 3 during class time. I spoke to the teacher back then and said that she was preparing them for the Naplan tests and going over some of the bits the kids didn't understand.

I still think that it is for the benefit of the school otherwise they would have done these "extra" classes back then too.

When it comes to the fee, the only resource that i could think of that would cost us $15 each would be if they got in a casual teacher just for those classes, otherwise what would it be? It sounds like a money making scheme to me.