IB to State Board for class 4. Would Allen Primary School in Abids be a big adjustment?

We're looking at options for next June, when our daughter moves into class 4. She has been in an IB primary since nursery: inquiry units, very little written homework, no marks. Allen Primary School in Wesley came up because a couple of families we know on the Nacharam side are considering it, and State Board appeals to us, partly for cost and partly because she likes structure more than we expected. The part I find hard to imagine is the change for her. Textbooks for every subject, written exams, marks on a report card. If your child moved from IB or a similar approach into State Board in the primary years, how long did the adjustment take, and what was hardest? And if anyone knows how Allen handles children joining in class 4, I'd be glad to hear it.