From what I read you either have 5 days or 15 to notify them in writing. I would do that first. You don't seem to have to tell them anything so I would guess you could change. I would think it would be harder to change from K12... it is also public school. If you were talking about the Discovery k12 I have listed below that is NOT the public school version. I started using it but it was not a fit for us. Reading is our priority. Since you don't even have to tell them what program you are using just play with them till you find a fit. The first 2 would be easy to create a portfolio from. The Charlotte Mason not as easy but do able.
Here is another free option
We use a kind of Charlotte Mason type method and Robinson Curricula
If she is a good reader this might be a good approach. You could get most anything you need from the library or online.
Yes I have already written a letter informing the school district that she will no longer be part of the public school system, I hand delivered the letter to the superintendents office and they will be mailing me and the school a certified letter that confirms the change.
Also yes I was looking into the Discovery k12 program, since for now it seems structured much like her school was doing and it also will keep track of all her work and attendance so I can look back and then I can print out anything that I may find necessary, like you said it might work well for putting together a portfolio. She did very well in the way the public school was structured and how she was being taught there so for right now I think something like this could work.
I will look into other programs though, you have provided so many links its amazing. I couldn't be more thankful that I found this thread to get me started and I thank all of you for taking the time to post and help me along. I do know I eventually need to source other support groups and I definitely will:) But for now, thanks the guidance!