Tentatively offered, but it might make sense to teach her about self-experimentation. I was thinking especially about cursive-- you can improve much faster if you think about what you want to change, develop an idea about what might change it, and then see whether your idea works.

I don't know about her, but when I was a kid, I was given the impression that you repeat what you're doing a lot, and then a miracle happens and you improve. This can happen, but it's more likely if you're doing something you're interested in. Even then, conscious experimentation is probably more efficient.

I agree that cursive is a waste of time. I'm a calligrapher, and it took me doing calligraphy to realize that (aside from any other issues), I hadn't liked cursive because it's ugly and unclear. Also, if you want to do it, it's easier if you understand the letter forms behind those loops. If you want pretty handwriting, italic is better.

Could it make sense for your sister to read this thread?