Audience Response Systems in Derbyshire #Derbyshire https://t.co/Ytj6mvsbvx
Audience Response Systems in Derbyshire #Derbyshire https://t.co/Ytj6mvsbvx
— Audience Response (@ukaudience) September 2, 2017
source https://audienceresponsesystemsuk.tumblr.com/post/164889999178
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