Khan Academy

Anki - a program which makes remembering things easy.

kurzgesagt exists to make science and humanism appealing to as many people as possible.

BrainPOP

IXL is the world's most popular subscription-based learning site for K–12. Used by over 17 million students, IXL provides personalized learning in more than 17,000 topics, covering math, language arts, science, social studies, and Spanish. Interactive questions, awards, and certificates keep kids motivated as they master skills.

Just a moment...

提供全面的阅读提升功能，搭载真人朗读与高亮跟读功能，可将任意文本转换为有声书，让你随时随地高效练听力。

Khan Academy