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.
Elementary, secondary and post-secondary education is a provincial responsibility and there are many variations between the provinces. Education is compulsory up to the age of 16 in every province in Canada, except for Ontario and New Brunswick, where the compulsory age is 18.