Elementary uses badges to signify achievement around character badges. Students demonstrate achievement by submitting two complete projects, researching individuals, creating a puppet skit, etc.
Nice overview of the potential of badges to hack education, disrupt how folks demonstrate their achievements, even at the higher education level, and more
Jewish education is leading the blazing trail in K12 badges. This article touches on some of the tinkerings, highlight Tamritz's work, Epstein School, Hebrew school and Seattle Hebrew Academy
The latest report from the Alliance for Excellent Education on how digital badge systems impacts teacher professional development and college and career readiness for students.
How Mozilla is making learning open, like the web. Great image of the live drawing created at the Open Badges Summit to Reconnect Learning 2014, showing "why badges"