More than half of school administrators in November said staffing shortages had gotten more severe since the beginning of the school year. Only 6 percent said the problem with shortages had improved.» Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and …

Chunks of ice crashed against the shoreline of Lake Superior amid bitter cold temperatures in the region. Original source (ABC/Youtube)

An extreme weather whiplash is hitting the U.S. Millions are under winter weather alerts from the West to the Northern Plains, and the Southeast is experiencing record warm temperatures.» Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. …