flip charts

In one famous trial in western Kenya, economists used the alphabet to decide randomly which of 178 Kenyan schools would receive flip charts.

在位于肯尼亚西部的一个著名试验中，经济学家使用字母表，在178所肯尼亚学校中随机抽取了一些学校，向它们发放教学用的活动挂图。

Within a matter of days, investors around the world had been sent terms sheets, flip charts and offering memorandums.

短短数天内，世界各地的许多投资者都收到了投资条款清单、活页图表和发行备忘录。

Previous evidence suggested that children learnt more with flip charts, but the randomised trial proved otherwise.

以前曾有证据显示，儿童在活动挂图的帮助下会学到更多，但随机试验的结果却与此相反。

Flip Charts and stand: preferably with large "post-it note" paper, and space in the room for it.

挂图及其支架：要在房间中提供放置的空间，并提供配套的大张“即时贴”。