Sierra,
The ladies are giving you wonderful advice.
![Very Happy :D](./images/smilies/icon_biggrin.gif)
I agree that if you are wanting your older son to do a tour through American history, then Bigger Hearts would be the best fit for him. You will also want to use the Extension Pack which is targeted for 4th and 5th graders, in addition to the rest of the scheduled books within Bigger Hearts. Bigger Hearts will also lay a strong foundation in copywork and writing that your son will need as he heads into Preparing Hearts the following year.
I agree with Rebecca that I would place your 5 and 6 year olds in Little Hearts for His Glory. It is so true that it is easier to beef up a program than it is to water one down. Doing Little Hearts will also give you a chance to make sure your kiddos writing ability has time to mature before heading too quickly into our upper programs which require more writing.
If you needed to add the right side of Beyond to "up" the level of language arts and math then that is easily done. You could add the right side of Beyond for the spelling lists, the gentle grammar lessons every 5th day, the Singapore 1A/1B hands-on math lessons (with 2A/2B in the Appendix), and the Emerging Reader's schedule in the Appendix. When your kiddos finish their phonics, they would just head right into the Emerging Reader's Set, following the schedule in the Appendix of Beyond.
I'd love to hear your thoughts if you get a chance to pop back in.
Blessings,
Carrie