1. On December 14, 1822, the Missouri state legislature passed a law allowing for the establishment of public schools, making Missouri one of the first states in the country to do so. This law also established a system of local school boards and provided funding for teacher salaries.

2. Missouri was admitted to the Union as the 24th state on December 14, 1822, following a controversial process that saw significant political and economic tension between pro-slavery and anti-slavery factions.

3. In 1933, the St. Louis Cardinals won the World Series on December 14th, completing a dramatic seven-game series against the Washington Senators. The Cardinals won by a score of 4-2 in the final game, clinching their third championship in team history.

4. December 14, 1981, marked the beginning of a historic strike by air traffic controllers in the United States, including a significant number of workers in Missouri. The strike lasted for four days and had a major impact on the national transportation system.

5. On December 14, 2012, a gunman opened fire at Sandy Hook Elementary School in Newtown, Connecticut, killing 26 people, including 20 children. The tragedy had a profound impact across the country, including in Missouri, prompting a nationwide conversation about gun violence and mental health.