它是什么？

Protects documents you handle frequently and creates sturdy pieces that you can add velcro to for activities.

它在哪里找到？

Your school/organization might have a large one, but it can be handy to have a little one at home.

我该如何使用它？

Laminating visuals that will be used throughout multiple sessions, and/or visuals that will be handled by students, preserves their integrity and saves you time and money in the long run by not having to reprint.