This would be wonderful for Adele. It is a shame for her education to be cut short just when she was starting to get into more of a routine with her learning. Whether or not she will agree is another matter, but I suppose that is always the way at her age.
She would be in what you class as 'middle school' I think. She is nearing 12, but her formal education only commenced when she was around 9. Still, she can read and write do basic arithmetic and what have you, of course. Ah, also, her first language is French, but she is much more competent with her English now, I am sure she would be able to keep up well.
As for myself, I'm not certain that I have any particular skills to pass on. I have a classical sort of an education, but I lack the patience to teach, I think. It is precisely why I never attempted to educate Adele on my own, and rather put that responsibility into the hands of others more suited to the task in their disposition.