Darci,
It looks like you will be set then! You can weigh whether or not your Jamie will need a higher level of Rod and Staff English based on what he's had previously for English. Of course, if he's already done Rod and Staff 2, just bump on up to 3. But, if he hasn't had much grammar you could start him in Rod and Staff 2 or 3, it's your call.
So, it looks like you would need the items in the Economy Package with the Science Adder. You would also need to add the items from the Basic Package that you want to include in your program.
The last choice will be how you want to cover the read-alouds in "Bigger..." (whether to order a Deluxe Package or whether to put together your own read-alouds based on the suggestions we give in the Appendix).
Hope that helps! It sounds like you are all together! It's wonderful when those little guys become readers, isn't it! It opens all sorts of new doors to them!
Blessings,
Carrie