Reddit mentions of Monday, Wednesday, and Every Other Weekend

There are some good children's books about divorce that might be helpful to read with her - Two Homes is a great one but probably a bit young for her; maybe try Standing On Your Own Two Feet. Fred Stays With Me is another good one, especially if she has a pet or favorite stuffed animal that will be traveling between houses with her. Mondays, Wednesdays, and Every Other Weekend has a similar premise but focuses more on dealing with the sadness that comes with this transition. Lastly, I'd definitely recommend the coloring/workbook When Mom and Dad Separate to open up more conversation and help her express what she's feeling.