|Recommended age||6 - 9 years|
|File information||pdf, 1 pages, 957 KB|
Here I have a summary of different call backs I've found on the internet. In my own experience, I think they are really useful to call your students' attention. Once they learn the answer, they immediately know what to do (stay in silence, sit down, etc). I normally change them after three weeks or a month.
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