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 up to the age of 16 in every province in Canada, except for Manitoba, Ontario and New Brunswick, where the compulsory age is 18, or as soon as a high school diploma has been achieved. In some provinces early leaving exemptions can be granted under certain circumstances at 14.