This document discusses using backchannels to give more students a voice in the classroom. It presents several backchannel tools like Todaysmeet.com, Twitter, Backchannelchat.com, and Socrative that allow students to participate and share thoughts online alongside in-person lessons. Backchannels can help teachers get feedback on student understanding to adjust lessons in real-time. Examples are given of how different tools could facilitate backchannel discussions for activities like opening lessons, seminars, and labs. The document encourages using various backchannel tools for different purposes to increase student participation.