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.
Education is compulsory in France from the ages of 6 to 16, but a large majority of children start school well before the minimum age, often as young as two years old, and over 50% of 18-21 year olds in France are still in full-time education, or else following a vocational training course.