Ohh I am sorry 
I have recently had to tell my 9 year old and 4 year old that their nana has cancer and the drs are trying to keep it controlled but I spoke to a local charity near us that deal with child bereavement and they are supporting me in every update I need to give my kids in a way that helps them. Weve not got to telling them this bit yet but all I can say is. Speak to school or Google pre and post bereavement services for children in your area and I hope she is as ok as can be. Xx
HI J69
Oh I am so sorry. My kids were a lot older when we had to break the news of my husband's terminal diagnosis but it wasn't any easier. Like MrsM2021 says I'd speak to the school but also check with your local hospice. I know our local hospice offers family support and have a dedicated support worker for young adults and children.
Other than that my advice as a mother would be to be honest with her but use language she understands and encourage her to ask questions.
Kids are resilient wee things and she might surprise you with her strength here
love n hugs
Wee Me xx
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