So, when we finish Bigger, I want to go straight into CTC! Tamara finished Preparing just around Christmas, and for Keri I would consider it starting fresh, as though it is her first time with HOD, and checking the placement chart, CTC will be a perfect fit. Right now, I am having them do written narrations so that won't come as a surprise when CTC starts. Keri wants more writing, and I know WWTB will provide that. The balance of different language arts lessons and DITHOR on alternating days will be a welcome change for her. Tamara wants more reading, so she will have that with CTC's history books and science books. Keri loves nature and biology, so I believe the science will interest her very much.
I have to say, it's also my way of trying to help Keri get excited about homeschooling for fall-because when she sees how exciting and challenging school is when we start CTC around May, and then we stop for the summer...I have a hope she will be eager to pick up where we left off in September instead of wanting to go back to public school
But you never know......maybe we should start in May too, just to satisfy my curiosity for Preparing 
After I submitted the order, I wished I had also ordered a copy of the student pages...lol oh well, I will have to wait some more...