Doug Lemov believes great teachers are made, not born
theguardian.com
theguardian.com
It sounds like the biggest problem's awareness (teacher bias). From there, a class roster and a pen would address tracking in the simplest form.
Really all the teacher would need is a RNG for the number of kids in class that would pick randomly with the restriction that you discard numbers that have been picked 2 (or n) addition times from the lowest picked number. That way there is still some fear that even though you have been called on you may still be called on before everyone else has been.
How is using a phone/tablet for this purpose any more distracting from the lecture than using a paper + writing instrument + writing? A mobile device isn't going to get in the way than keeping an attendance sheet on a desk/podium/clipboard and using that.
This sub-thread isn't about ways to correct student behavior (Doug Lemov article). We're talking about the NARST article, which explicitly lists a process where you call on students, using a roster. There's nothing discreet about that.
Although there's no harm in mentioning it, and there may certainly be a correlation, it's worthwhile to note that the credential doesn't make the man: having a Ph.D. in physics education is no more a guarantee that one is a good teacher than having a Ph.D. in English is that one is a good writer.
Edit: we'll use the subtitle for now.