1. Active learning for the college classroom 2011 http://www.calstatela
2. Anonymous 2015 Merriam-Webster's online dictionary http://www.merriam-webster.com/dictionary/anonymous
3. Encouraging college student active engagement in learning: The influence of response methods;Barr;Innovative Higher Education,2013
4. The “millionaire” method for encouraging participation. [Electronic version];Beekes;Active Learning in Higher Education,2006
5. Bonwell , C. C. Eison , J. A. 1991 Active learning: Creating excitement in the classroom. Retrieved from ERIC database. (ED340272)