I'm not a parent, but I had a period of time, about a month, when my Mom had to teach me, because I couldn't attend school. What worked well for us was structur

I'm not a parent, but I had a period of time, about a month, when my Mom had to teach me, because I couldn't attend school. What worked well for us was structuring and scheduling time. What didn't work well was her winging it with the curriculum. I think if we went through that time again and I was in her shoes, I would take advantage of Khan Academy. Especially for Math, it's incredibly well structured and forces you to convince it that you've truly learned the content with built-in quizzes. It doesn't hold you back if you've got a handle on the lessons and makes sure that if you're having issues that you practice until you've really got it down. I think the most work for you will be setting her up properly, making sure she's comfortable with the system, and being available if she's got questions that it's not quickly answering.