It's important that children spend some time in conversation. Brain research proves that, and as classroom teachers, we know we need to let them talk... sometimes!
Brain research also proves that getting the emotions involved helps the memory. (Think back to those very emotional times of your own life... they bring back strong memories, don't they? Think: weddings, babies, holidays)
For those reasons, I make sure my kids play plenty of math games. There are so many math skills that need to be repeated to be strengthened, and games can be played again and again!