The kids worked very independently and discussed it in their own little groups. I was quite impressed how much they understood it and were able to help each other.
For some of the kids, they understood the strategy/skill but didn't have the basic facts knowledge (knowing their times tables) to be able to do it quickly. So we packed up a little early, and practised our basic facts.
I think I love cross grouping.
In one way, it was awesome to see my kids from last year (the ones who aren't in my class again this year), and in another, it was so AMAZING to have a smaller range of ability in the class so you could really target learning and push them harder.