Suggestions in Ruth Beechick’s You Can Teach Your Child Successfully are easy to follow. So, are the simple suggestions from Charlotte Mason Help, which I’m liking better all the time.
I used IEW for my older kids during these grades with great success, but I’m finding we don’t need anything formal anymore for the younger ones. That said, our youngest loves Queen’s Language Lessons and Serl’s PLL. I can see her continuing with either, or both of those, IF she seemed to need it. Otherwise, she’ll just be writing narrations, etc. and we’ll go over any punctuation, grammar usage, spelling as needed based on her writing.