Who fails more often at school: boys or girls?

Very soon  my students will go to schools to teach foreign languages to  kids. It may be a great challege for them because many kids are not motivated at all to study a foreign language. They often resist all the teachers' efforts and fail to do the simplest tasks. As a rule, boys fail  more often than girls. The video that I suggest my students to watch explores this topic. What do you think about the ideas discussed in the interview?