My kids school is mostly all combo classes. It worked great for my DD10 when she was the younger grade because she listened to the older kids when she was done with her work. It otherwise wasn't much of a problem in the earlier years, but 4th grade was horrible for her because she was so bored. The good part about it was that it resulted in her skipping 5th grade because she was done with all of her work in 4th grade in 10 min when there was still another 50 min left in each subject period. We survived with books and a Thinking Skills book. My DD8 was headed to 3rd grade this year and there were no 4th graders. So, we decided to homeschool her.
