many hands make light work 人多好办事；众人拾柴火焰高 ；人多力量大

【例句】
As the saying goes, many hands make light work, teachers 'collaborative reflection can compensate forthe shortage of teachers' independent reflection.
俗话说，人多力量大，协作反思正好可以弥补上述不足。

Many hands make light work. I think this could force them to improve a little.
众人拾柴火焰高嘛。我想总能让他们改进一点儿吧。