Here are some childcare tips for parents of kids with ADHD:
I would definitely talk with the caregiver about her behavior and how to best handle it.
Then, here are a couple articles on anger in children with ADHD and how you can improve it:
I really like the Zones of Regulation program for teaching emotional awareness and control too. We did it with my son’s OT, but you can also do it at home (we had to do it at home too, of course).
ADDitude Community Moderator, Author & Mentor on Parenting ADHD, Mom to teen w/ ADHD, LDs, and autism