Hrheingold: I illustrate how I use bookmarklets and extensions to curate w/ Diigo, Scoop.it, Pearltrees. Facebook. A Social Network Can Be a Learning Network - Online Learning. By Derek Bruff Last fall, for my first-year writing seminar on the history and mathematics of cryptography, I posted my students' expository-writing essays on our course blog.
The assignment had asked students to describe a particular code or cipher that we had not already discussed—how it came to be, how it works, how to crack it, who used it. They described more than a dozen codes and ciphers. Twitter. Google+