Imagine that one afternoon after school the teens you work with are hanging out at the library reading articles of personal interest on their iPhones. All of a sudden one of the teens reads something that she has to let others know about. So, she decides she wants to Tweet the link. But, really what she wants to do is highlight one particular sentence in the article for her friends to read. She could copy and paste the text into Twitter, but maybe that makes her Tweet too long to post easily. But then she realizes, I have OneShot on my phone and I can take a screenshot of the part of the article that I want to point out, highlight the text on the screenshot, and then add that image to the Tweet. So, that’s what she does.