Sleep paralysis occurs as a person is moving into or out of REM (rapid eye movement) sleep, the deepest part of sleep. During REM sleep, the body is largely disconnected from the brain, effectively leaving the body paralyzed.
England and a few other countries start formal education at age 4 or 5. That's harmful and misguided.
A comment to Norm, 09-08-31: if adults (over 15 years old) of a country have an average of 12 years of schooling, it means that if the started school when they were 6 years old, the average citizen has been in school until 18 years old.