I have been teaching preschool for more than 30 years, and I’ve been through some troubling times—from the AIDS crisis to the 1989 Loma Prieta earthquake to the attacks on the World Trade Center on ...

You've been asked to make a presentation to your company, an organization or a school, and the requirement is that you have to speak – into a webcam – for a half-hour or so. How do you keep the ...