blessedmomof4,
Thanks so much for sharing about your children. It really helps give a much clearer picture of where they're at. Here's my advice on a few key areas you mentioned. Sometimes it helps to bounce around a few options, as it may lead you to discovering what you really think is best! I know I have to process through things with my sisters A LOT before I know how I really feel!
So here goes:
1. The Extension Package books are designed to add more additional history reading for those kiddos that are ready for more in this area. The readings are designed to be done independently, and are in no way supposed to require any help from you! The kiddos need to be strong readers to read the listed books in the Extension Pack and the books are not a necessary part of the program. So, my advice would be not to do those anymore with your 4th grader. There is plenty of content in the history read-alouds you're already doing for the rest of "Bigger....".
2. With "Drawn into the Heart..." if the suggested books are too hard, I would step back a level to where reading is not such a struggle. Your daughter needs to feel success! Also, it is much more important to spend your reading time with her using DITHR, instead of frustrating her with the Extension Pack readings. Let her learn to enoy reading by keeping the readings short and use books with any topic that interests her!
3. As far as Singapore goes, it is usually reccommended to start a semester or even a year back when coming to Singapore Math from a different program. 3A is a very difficult level to enter Singapore. So, I would give her the placement test and see what level she places at now. I wouldn't go any further, until you know you have her placed correctly. Here is the placement test:
http://www.singaporemath.com/Placement_Test_s/86.htm
Depending where she places, I would back her up to at least 2B. Singapore is very advanced in scope and sequence, and you really notice it in 3A/3B. Don't worry about being on grade level, or getting behind. Singapore Math only goes to 6A/6B and that is considered pre-algebra level. One other option would be to return to your old math program if it seemed to work better for her if you are just tired of Singapore for her!
4. As far as working straight through the year with no breaks to finish by June, I wouldn't worry about keeping that pace for you or your kiddos. I would continue to move forward, but I wouldn't be worried about taking a break here or there. You need to enjoy the journey. When I mentioned not slowing down in my previous post to you, I wasn't sure what type of schooler you were. Some moms school more randomely and struggle to finish any program, so they need encouragement to keep keepin' on. Other moms are so programmed to complete a year within a year that they need permission that it's o.k. to take longer if needed. And some are in between! At our house, we have sometimes had to go a quarter into the next school year to finish. We did it with "Little Hands..." and with "Little Hearts...". It worked out fine!
5. It will be fine to use "Preparing Hearts..." without the Extension Pack books for your older child. In fact, you could have your 4th turning 5th grader use the Deluxe Package books right along with your younger child instead. Or, you could have your younger child not do the Deluxe Package at all and save that for only your older one. Your younger will get plenty of history just listening in with the read-alouds.
As far as your successes with your children, I'm so happy for you. It is affirming to see them gain and grow. I also know working with them on their areas of weakness can be wearing! But, I want to assure you that you are not alone, because all kiddos have areas of weakness. Yet, the ones who have had to struggle often turn out to be amazing adults who know what it's like to work hard at something!
Hopefully these ideas will help you process through things a bit and encourage you to tweak the program to make it work for your family better!
Blessings,
Carrie