This summer, battle lines were drawn over a simple math problem: 8 ÷ 2(2 + 2) = ? If you divide 8 by 2 first, you get 16, but if you multiply 2 by (2 + 2) first, you get 1. So, which answer is right?

According to research by the author of Playful Interactions Dr. Karyn Purvis, scientists have determined that it takes approximately 400 repetitions to create a new synapse in the brain — unless it’s ...