Research
Below is a list of articles critical of the use of ClassDojo and other Grade Tracking Apps:
https://www.vox.com/life/379082/school-tracking-apps-grades-google-classroom-classdojo
http://www.huffingtonpost.com/dr-brigitte-vittrup/class-dojo-app-is-already_b_8287582.html
https://joe-bower.blogspot.com/2014/11/6-reasons-to-reject-classdojo.html
https://theconversation.com/classdojo-raises-concerns-about-childrens-rights-111033
http://www.teachingace.com/thinking-about-classroom-dojo-why-not-just-tase-your-kids-instead/