In the past I combined my son and daughter into LHFHG and Beyond. This year I wanted to separate them so I put my son age 9 (young 4th grader) into Bigger with extensions. He is doing well. I started my 7 year old (young 2nd grader) doing something else with emphasis on the 3 Rs for her. (I wanted to separate them before they got to the higher guides and could tell they would do better on their own instead of being combined) Well, my 2nd grader insisted on listening to the read alouds (which was fine with me) but she also is listening in on the history and science as well. I've started realizing she is "doing" Bigger without all the vocab., history or science sheets.
My intention had been to put her into Bigger next year either half or full speed but she seems to comprehend as much as my son from the readings and now I'm having 2nd thoughts on putting her into Bigger "again" next year. I mentioned it to her this week and she groaned at me reading the same books over again next year. Here are my thoughts as of "today".

I'm wondering if I should have her start the vocab, history sheets, science exp. & notebooking, timeline, etc. now....we are on unit 15 this week. That way she gets started on all of that...maybe starting with only one or two vocab. words and seeing if we can work up. She already does activities and such with us. When I look at the placement chart she now fits into Bigger. She fit more into Beyond in the beginning of our school year. The more I "talk" about this the more I like this idea as opposed to doing the year over again with her.
If I did this, then my dilemma would be what to do for 3rd grade. I'm not sure she would be ready for Preparing...okay...now I'm talking myself out of this.

I keep going round and round. If she was in Preparing next year she would have to go 1/2 speed while my son when full speed. I'm not sure how that would work or look either.
Any suggestions or experiences with this type of thing? I thought I was solving it this year by separating them...ha!

Thanks for any input!