N-COUNT Visual aids are things that you can look at, such as a film, model, map, or slides, to help you understand something or to remember information. 直观教具
He also prepared visual aids, diagramming photo line, so his classmates wouldn't get confused.
他还准备了视觉教具，绘制了照片线，这样他的同学就不会被弄糊涂了。
Then they try to teach the students something with a specific presentation style, like using visual AIDS, and do a follow up test to see how much they learned.
然后他们试着用一种特定的演讲风格教学生一些东西，比如使用视觉辅助，和做一个后续测试，看看他们学到了多少。
Complement your speech with visual aids.
运用视听辅助教具完善你的演讲
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