I just started riding this year, and finished the BRC last week.  One thing that really helped me with leaning into curves was looking where I want the bike to go.  They repeatedly told us in the class to point your nose where you want the bike to end up, and I was amazed at how much it made a difference.  It wasn't natural at first, but the more I did it, the more I realized how effective it is. I am sure she will learn a lot at the class, and at least she will already know what she wants to work on when she gets there.  Good luck!