Terri - You'll soon be having your precious baby, and we all know that while this is an incredible blessing, time caring for the baby will most certainly take up a good portion of your day. I do believe HOD is one of the most friendly curriculums out there to teach - with little prep and clear-cut plans, it truly is possible for a responsible child to teach in a pinch. My 10 yo is super helpful and at an age where he enjoys being more independent. I am wondering if your 10 yo could just be responsible for doing the left side of Beyond with the 6 yo and 8 yo. The 3 of them could have a quick breakfast and get started in another room while you take care of the "littles".
Your 10 yo could read the Reading about History selection on the couch to the other 2. Then, she could do the bottom left hand activity box (that rotates) with them, with you available to answer questions if she has any. About that time, your littles could be done with breakfast and you could all sing the Corresponding Music selection together (we often march around the kitchen and the toddler loves it). After that, they could practice their Bible verse together, do the simple calisthenic often suggested (a welcome bodily/kinesthetic activity at our house
), and then take turns saying it for 10 yo dd. On the last day when they share it, they could all share it with you. Last, your 10 yo dd could certainly do the poetry box with them, and get them started on their copywork. You could skim the right side of PHFHG, seeing if your 10 yo needed your help for anything. Then, she could head to a private, less noisy place to do the right side of PHFHG independently. After the 6 and 8 yo finish their copywork, you could put baby and 2 yo to nap and finish the right side of Beyond with the 6 and 8 yo (if it's not 2 yo's nap time, I'd give 2 yo snacks and have him/her watch a Barney video somewhere somewhat away form you that is safe. Then, Spelling should take 5 minutes, Phonics is important to do with each of them (but be sure to choose a time conscious program such as The Reading Lesson), Storytime should take 10 minutes or so (pick shorter books with short chapters, or simply have them listen to audio books and follow along), finally Singapore math should not take more than 15-20 minutes either. You should still have some time left of baby's/toddler's nap to rest yourself hopefully. If I were you, I'd get ready myself first in the morning, get school done, and then dig into the chores of the household in the PM.
You could go to a textbook approach if you wanted to. I personally think that so much is missed in doing school with a textbook approach though - much of the "heart" of learning is gone and very little retention seems to occur. However, there is a place for textbook learning. It does not require much teaching usually. I know you are tired and overwhelmed, but I also know you want more for your dc. I think your dd can step in here and help for this season in life. If she were doing textbooks, she'd be independently doing things anyway, why not just have her doing and leading Beyond's left side? Eventually though, after baby is settled in and you are back to normal, you will want to be teaching again. Being active like this in our dc's homeschooling is a mother's heart's desire, and I want that joy for you again. If there is anything you can cut out of your life that is stealing your time, that would be good to consider too. For example, I found I was taking a bunch of time each morning to pick up the house and ready it for school and for the day. To save that time, we have the dc "cleansweep" (sweep through the house and pick up) the house before bedtime and we run the dishwasher. This has helped so much! I also found the phone was stealing my time. So, I told everyone that we needed to make homeschooling a priority and I'd not be answering the phone until after lunch each day. This has made a HUGE difference in what we can get done and in my stress level. Another time stealer for me was getting on the computer for emails, message boards, checking a quick website for information, etc. I do not touch my computer until school is done now, and that has made a big difference as well. I know you are a busy mom with many dc, and that sheer numbers keep you hopping all day, but I bet if you set out a legal pad and jotted down what you were doing all day you'd find some simple changes you could make that could help (I sure did!).
This order I suggested doing things in is simply that - a suggestion. I know it may not work perfectly, but hopefully it can give some practical ideas and help get the ball rolling. God is always the best decision maker, so bring your concerns to Him and see what direction He leads you in, Terri. I am praying for you and hoping everything goes smoothly for you and your new little one soon! God is big enough to walk you through all of this, to be by your side and show you the best way. I know He will do that for you because you love Him as He loves you.
Love in Christ,
Julie