Jonathan Haidt: The combination of social media plus smart phones is irreparably damaging grade schoolers and middle schoolers. He offers this advice:

1. No smart phones before high school, when they are 14 (only flip phones)

2. No social media until age 16.

3. Phone free schools. No phones even in backpack. They must be kept in a locker.

4. Far more free play and unsupervised play to develop childhood independence.