Introduction to Dialectics
Dialectics is one of the most important concepts to contemporary philosophy. Of course, one of the biggest names when it comes to dialectics is Hegel, whose writings are also some of the most difficult to parse out. Luckily there are some good resources out to help fill any gaps.
Dialectics for Kids: It may look like a janky relic from the 90s internet, but the site has some good, simple exercises and stories to help establish the concept. Literally teach your children with this site.
Finally, the video linked above is from the movie Half Nelson (2006), which provides an excellent summary of dialectics as well. It will also make you wish your history teacher was Ryan Gosling.