Premier Danielle Smith and the Alberta government ended a three-week teachers' strike by forcing them back to work and invoking the notwithstanding clause — pre-emptively shielding it from constitutional legal challenges. Andrew Chang breaks down the UCP government's reasons for using the clause, why it's causing alarm beyond teachers' unions and why reaching a deal has been so difficult for both sides. 00:00 - Intro 01:26 - The roots of unrest 05:00 - The turning point »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://www.tiktok.com/@cbcnews Subscribe to CBC News on Snapchat: https://bit.ly/3leaWsr Download the CBC News app for iOS: http://apple.co/25mpsUz Download the CBC News app for Android: http://bit.ly/1XxuozZ »»»»»»»»»»»»»»»»»» For more than 80 years, CBC News has been the source Canadians turn to, to keep them informed about their communities, their country and their world. Through regional and national programming on multiple platforms, including CBC Television, CBC News Network, CBC Radio, CBCNews.ca, mobile and on-demand, CBC News and its internationally recognized team of award-winning journalists deliver the breaking stories, the issues, the analyses and the personalities that matter to Canadians.