Research
Below is a list of articles critical of the use of HERO K12 and similar systems:
http://www.paaoregon.org/single-post/2017/07/03/Hero-an-Edtech-Innovation-from-1904
https://wrenchinthegears.com/2018/09/13/our-future-as-social-machines/
https://nancyebailey.com/2017/09/03/the-troubling-trend-to-collect-behavioral-data-on-all-children/
https://www.facebook.com/TheOptOutFloridaNetwork/posts/1926128764108127