We use padlet.com (formerly, Wallwisher) a lot in my room. We have used it to show our learning at the end of a unit of study, we used it for the Global Read Aloud this past year and invited other classes to comment on the book Charlotte's Web, and we have created a wonder wall to write down our wonders during the day.
Today, we used it a little differently. I am currently teaching my students about identifying explicit information...