The document appears to be an image file of a slide from a presentation that discusses English language learning. However, as the document only contains an image without any surrounding text, there is not enough contextual information to provide an informative 3 sentence summary.

1. 6/12/2018 slide_eng7.gif (560×333)
https://ronblumus.files.wordpress.com/2018/05/slide_eng7.gif?w=825 1/1