教学工具

Create a free countdown timer to any date with time zone, embed, custom background image and push notification support to when the event ends.

一个木函是一款多功能效率工具箱，拥有许多众多热门高效小工具

Free online PDF tools to merge, compress, create, edit and convert PDFs. Quick and Easy. Without installation. Without registration.

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希沃白板5，是一款专门针对教学场景设计的互动课件工具，提供课件云同步、学科工具、思维导图、课堂活动、超级分类等多种备授课常用功能，只需简单的操作就能让您的知识点跃然呈现。

Free digital tools for class activities, graphing, geometry, collaborative whiteboard and more