Khan said students also learn the study material at their own speed through videos.

可汗还说到，这里的学生们能够按照自己的学习进度来观看教学视频，学习课程。

youdao

Khan said students also learn the study material at their own speed through videos.

可汗还说到，这里的学生们能够按照自己的学习进度来观看教学视频，学习课程。

youdao