Slide 4 of 34: ``I pledge allegiance to the flag of the United States of America...'' How many times did you stand and recite those words when you were growing up? While the Pledge of Allegiance might feel like something that's been around forever, it was actually written in 1892 by <PERSON> as part of a contest designed to promote sales of the weekly children's magazine Youth's Companion. And while the Pledge today is quite similar to <PERSON>'s original version, it has undergone some significant changes over the years: Notably, the phrase ``under <PERSON>'' wasn't added until 1954. And if you want to set yourself straight, correct yourself on these 25 Things We Learned in School That Were Completely Wrong.