I have used Poll Everywhere, Padlet, Google Docs/Forms for checking students' group work in class, but I've always wanted a simple tool that takes a second for students to complete and another second for me to check their completion but a tool where students don't get to "cheat" by peeking at what other groups are writing because they can't see what other students are typing until they post their answers!
This is a wonderful, cutting edge tool on the web for using the power of Mathematica to computer along with the endless databases of facts and figures that can be found on the internet at large. It can be a great resource for students, but it could also be something they use to cheat in certain situations so be aware.
"Wolfram|Alpha is more than a search engine. It gives you access to the world's facts and data and calculates answers across a range of topics, including science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music..."
Freakonomics by Steven Levitt and Stephen Dubner was a New York Times bestseller in the early 2000's. Here is the description of Stephen Dubner's Radio Show: "Freakonomics Radio is an award-winning weekly podcast (subscribe here!) with 8 million downloads per month. It can also be heard on public radio stations across the country, on SiriusXM, on several major airlines, and elsewhere. Host Stephen J. Dubner has surprising conversations that explore the riddles of everyday life and the weird wrinkles of human nature - from cheating and crime to parenting and sports. Dubner talks with Nobel laureates and provocateurs, social scientists and entrepreneurs - and his Freakonomics co-author Steve Levitt. Freakonomics Radio is produced by Dubner Productions and WNYC Studios."