如何可讓學生在課堂上發言?

[tim.tl.lin-tw.viewsonic.com]

老師可以允許/禁止學生對整個同學講話, 更多資訊:
https://wiki.myviewboard.com/tc:Classroom#.E8.88.89.E6.89.8B.E7.99.BC.E8.A8.80