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| 2024/08/29 20:24:41瀏覽19｜回應0｜推薦0 | |
| https://www.khanacademy.org/
Khan Academy is an American non-profit educational organization created in 2006 by Sal Khan. Its goal is to create a set of online tools that help educate students. The organization produces short video lessons. Its website also includes supplementary practice exercises and materials for educators. |
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| ( 知識學習｜其他 ) |
