I really enjoyed Hack Education, it has sensible, well-researched analyses.
I would recommend:
- Halavais, A. M. C. “A Genealogy of Badges: Inherited Meaning and Monstrous Moral Hybrids.” Information, Communication, and Society 15, no. 3 (2012): 354-373 - read the online version published here: http://alex.halavais.net/a-genealogy-of-badges
(it draws attention to the implicit language of badge systems, and opens up the context to include other types of badges)
- Jakobsson, M., The Achievement Machine: Understanding Xbox 360 Achievements in Gaming Practices, http://gamestudies.org/1101/articles/jakobsson
(a detailed study of badges in gaming and how they they transform the practice of gaming)
- Highashi, Ross et al., The Roles of Badges in the
Computer Science Student Network, http://www.ri.cmu.edu/pub_files/2012/6/GLS_Conference_Proceedings_June_2012.pdf
(it presents a large scale badge system for Higher Education, it may offer inspiration).
Hope they would make for some good lectures.