When the father walks into the school room, he clearly writes the word REPENT in all caps on the board. If you look carefully, it is still the original "REPENT" from the far camera angle, but when it switches to the zoom-in on the teacher, you can tell the word has been rewritten. For example, notice the first "E" is now smaller.
Opening Narration: Most of us on Walton's Mountain prided ourselves on our friendly hospitality, our family's good name, and our dignity as individuals, but in a remote hollow lived a man named Lutie Bascomb, with his daughter Lois May. If Lutie prided himself on anything, it was his cussedness.
Closing Narration: I can only ask you to take my word for the end of the story of Lois May Bascomb, for truth is far stranger than fiction. I was to meet her many years later when she had become not a scientist, but the wife of a diplomat. She now lives abroad and I expect that sometimes her memories, as mine do, return to those Depression years, and Walton's Mountain.