talk more! student desk speedometers

Fortunately they could sample this with phones duct taped to desks to see if it actually works. Preferably the quieter students voluntarily participate more

Also the software could be interesting Perhaps some speakers have a multiplicative response effect thus the display might urge these catalytic speakers to speak up

There is also a feminist technology application. Teachers could track what are published as gender asymmetric discussions then automatically prompt more women or girls to speak up

It might be reassuring to some students to have their "participation " grades quantifiable