In 2000, Martin Luther King Day was officially observed in all 50 states for the first time. It was a long and arduous battle to gain national recognition for the life of the civil rights icon. If your kids are anything like mine, that is probably hard for them to believe. The life of Martin Luther King Jr. is practically central to the public school civil rights curriculum. It may seem as though the leader was always universally celebrated and respected. In actuality, it wasn’t easy to get national recognition for the slain leader. Here are seven facts to teach your kids about the history of this important day.