What further action do you feel would be appropriate?
imo, the apology is enough. It would be disproportionate to drum her out of the profession or have her tarred and feathered much as I can understand motherly anger would be baying for that right now 
When I was a kid, our teachers would chuck all sorts at us. Blackboard rubbers, chalk, rulers, you name it. And scream like banshees.
Now I am not suggesting we go back to those times! But ducking to avoid a flying blackboard rubber didn't have a lasting effect on most of us so I am just trying to reassure you that your child is unlikely to suffer unduly because she had a book lobbed in her direction and a few harsh words.
In fact, due to the apology, she is likely, with your help, to understand that people get angry and while it's not right, an apology helps. You can help her to see that and also to understand that it is nice to forgive people who apologise to us and to see that we all make mistakes sometimes.
The issue of the standard of her work is a separate matter, I am sure she is doing her best so perhaps when things have calmed a bit, you can find out where the teacher thinks the room for improvement is and how better that can be addressed because clearly yelling and chucking stuff is inappropriate.