I home schooled (4) children, with (3) toddlers born in a period of (3) years. Somehow it all worked out! Some days I really did wonder if we were making any progress at all, but we were "headed in the right direction" and that was what counted! My DD17 finished high school a year early and is now attending a Christian university. The Lord will honor your faithfulness to Him and will bless your efforts, if you put Him first.
My advice to you is:
Start the day off with Bible. It sets the pace (tone) for the rests of the day. (Our children enjoyed the ABeka "Flash-a-Card" Bible program.) Respect and honour to God and His laws will provide guidelines for their behavior and conduct. Memorizing scripture (and scripture songs) together, will "hide God's word" in their hearts. I highly recommend singing together as a family.
Include the younger ones in your lessons as much as possible, even if it seems they are not "catching on" to anything you are saying. You will be surprised! My DD17, when she was only 5, began to read very quickly, through listening in on lessons from her older brother.
Provide a "work space" for the younger children to look at picture books, or draw. The younger ones felt "quite grown up", when treated as though they were part of our school day. They often sat quietly for hours, playing with math blocks on "their desk" and sketching pictures. They enjoyed being in proximity to our "classes".
Try using "multi-level" programs and resources such as
"Winston Grammar", "Bible Songs" and "Grammar Songs", so that all the children can participate and learn together. They DO remember what they sing!
I'm sure there are other ideas I haven't written down yet, but I can add to these later as I think of them. These should help give you a start.