Audience Response Systems in Derry #Derry...

Audience Response Systems in Derry #Derry https://t.co/mv6xOKF6LS

Audience Response Systems in Derry #Derry https://t.co/mv6xOKF6LS

— Audience Response (@ukaudience) September 4, 2020

source https://audienceresponsesystemsuk.tumblr.com/post/628319824470294528