The best resource I’ve found for brain research in regard to education is by Judy Willis. A neurologist turned teacher, Willis makes understanding all this stuff really relatable to the classroom. One of the most important points she makes is that people are not born at a certain intelligence level and stay that way. Intelligence is not gifted at birth, unalterable; and when students realize that they can alter their brain, it is absolutely empowering.
This myth that the brain is unalterable feeds into the insecure world of a middle schooler. To take from them that false burden of “that’s just the way it is,” is liberating. Anything you can do to help a ‘tween feel more secure in their abilities and possibilities will potentially improve their achievement in your classroom. Anything you can do to make a ‘tween feel more in control becomes a powerful tool for you and for them.