Whether or not one believes Khan Academy is helping to reinvent education, it’s hard to dispute the fact that Khan (and now his team) are an educational video-producing machine, or that the platform continues to diversify. In part, that started with the release of its iPad app in March. This week, Khan Academy brought its 3,500 videos to the iPhone.

K12 在線教育的領(lǐng)跑者 可汗學院在今年 3 月份發(fā)布了自己的 iPad 教學視頻，本周，可汗學院繼續(xù)發(fā)力移動端，推出了自己的 iPhone 教學應(yīng)用，超 3500 個教學視頻現(xiàn)在觸手可及。

Nonetheless, the online learning academy continues to press on. As part of the latest update to its iPad app, the company added support for the iPhone, which now allows users to access its library of videos on the go. Unlike Khan’s iPad and web apps, the new app doesn’t include the ability to download the videos so that they can be watched offline, subtitles, or track your progress through the academy and unlock achievements. Instead, the app simply allows you to watch videos.

可汗學院在今年 3 月份發(fā)布的 iPad 增強版支持設(shè)備之間的時間同步，而且還加入了交互式的講座文本以便于用戶搜索。不過，跟可汗的 web 應(yīng)用和 iPad 應(yīng)用不同，這款 iPhone 應(yīng)用目前的功能還比較初級，只允許學生在線觀看視頻，沒有相應(yīng)的字幕，不支持離線觀看，另外也無法跟蹤學生的學習進度。

This might make the app seem undercooked — and in a way it is — but it could actually be a smart move given the limited form factor. Stuffing the entire Khan Academy experience onto the iPhone’s screen likely would diminish the experience of its visualization tools, interactive transcriptions and some of its better gamification and progress-tracking features.

你可能很好奇，為何它的 iPhone 版應(yīng)用會如此簡陋?？紤]到 iPhone 的體型和參數(shù)限制，將整個教學體驗、包括各類視覺工具、交互式的視頻文本、游戲機制和進度跟蹤一下子一股腦兒封裝到里面似乎不太可能。與其如此，可汗學院先將那部分最核心的內(nèi)容，即視頻本身盡快呈現(xiàn)給讀者，似乎并沒有錯。

Nonetheless, by opening up the Khan experience to iPhone users, they can now access Khan’s instructional videos on the go, while on the bus or during long car rides — all of which is huge for students and fans of the educational platform.

另外，在線教育的一個很大優(yōu)勢在于打破地理、時間的限制，讓學生隨時隨地可以學習，所以可汗學院的 Android 版應(yīng)用也有望在不久的將來推出。

Sal Khan started out creating tutorials on Yahoo’s Doodle Pad to help his cousin do her math homework. When other family members began asking for help, he posted them on YouTube. Fast forward to the present and Khan has gone on to create some 3,600 videos, which collectively have been viewed over 210 million times. Along the way, his instructional library became Khan Academy and gained support from the Doerrs, Bill Gates and many others, and Khan himself became the “teacher of the world” and the “Messiah of Math.”

最后，可汗學院的教學視頻累計觀看次數(shù)已經(jīng)達到 2 億 1 千萬次，而 Slam Khan 本人也被稱為“teacher of the world”，世界之師，足見其影響力。