求翻译：besides a good start,there are some other factors teachers need to consider.Halliwell has proposed some ideas to help us think how we can adjust the classroom atmosphere by using different activities.she points out that it is important for primary chool teachers to understand which activities"stir"a class,which activities"settle"it."stirring activies",from a positive way,can wake the children up and stimulate them,but from the negative aspects,they may make the children over-xcited and restless."settling activities",on the hand can make the children calm down when they are over-xcited and they can also bore the children as well是什么意思？

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