When my students become familiar with the calendar routines, their participation becomes a bit lack luster. Each student made a word-o-phone to encourage more vocal participation.
Each student need a cardboard tube. We used paper towel sized tubes, but any size will work. They can be decorated or left plain. Students use their word-o-phones to amplify their voices as they read or count as a group. I notice the students pay more attention when I use my word-o-phone to give directions. I also place my word-o-phone to my ear to encourage even more vocal participation.