Something else to add ... there was an influx of draft dodgers from the Vietnam War, and a lot of those became teachers. Canada was investing in their education

Something else to add ... there was an influx of draft dodgers from the Vietnam War, and a lot of those became teachers. Canada was investing in their education system at that time whereas the U.S. was trying to choke off campus protest movements. Fast forward half a century, and that investment has paid dividends.