They also show people who look like those we need to educate, since people can relate more when they see familiar faces and language they can understand. (Para. 9)
Meaning: They also use pictures that look like those people that need the education so they can understand more when they find familiar faces and language they know.
relate: say or tell
After seeing the film, the student was able to relate every point in English. 看了电影之后，那个学生能用英语讲述每一个细节。
The traveler related his journey with joy. 那位旅行者愉快地讲述了他的旅途情况。