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.
China describes its education system as having four components; basic education, occupational education, higher education and adult education. Basic education comprises pre-school education, six years of primary schooling; three years of junior secondary schooling and then three years of senior secondary schooling.