1. Resnick, M. (2012). Still a badge skeptic [blog post]. Retrieved from http://hastac.org/blogs/mres/2012/02/27/still-badge-skeptic.
2. The Role of Assessment in a Learning Culture
3. Everhart, D. , Sandeen, C. , Seymour, D. , & Yoshino, K. (2014). Clarifying competency-based education terms: A lexicon. Blackboard.com. Retrieved from http://bbbb.blackboard.com/Competency-based-education-definitions.
4. Are badges useful in education?: it depends upon the type of badge and expertise of learner