I wondered if it might help if I asked you some questions that parallel what the placement chart is trying pinpoint? I'll give it a try, and then maybe you could try to answer them to the best of your knowledge? Then we can shoot from there.
Do you think you could share some books each of them have read independently and understood well recently?
Have they been reading their own history and science, and if so, have they been able to do well with that?
Have they had any formal literature studies, where they have learned about story elements, like plot, setting, contrast, etc.?
How much are they able to comfortably write each day? Sentences? Paragraphs? Pages?
Have they had grammar, and if so what program(s) have they done? Have they done any diagramming of sentences?
How would you say they follow step-by-step written directions?
Do they work fairly well independently, or do you need to be right near them reading directions to them and helping them complete assignments?
If you get the chance to tell us about each of your dc in regard to these questions that would really help us give better advice, as we all know dc can vary greatly in what they can do at any given age or stage in life. I'd love to hear any answers you have, and then would be glad to help you pick a placement. All of the HOD guides are amazing, so whichever one best fits your dc skillwise will be the one that will give you the best year. I'll check back, and we'll chat this through! I know the other ladies will help then too - this board is full of the most wonderful Christian ladies - so encouraging, and such kind hearts. HTH!
In Christ,
Julie